AI Tools System Reference

AI Tools Access Guide

From regional checks, account sessions and streaming output to APIs, command-line tools, IDE plugins and CI environments. The priority is not constant route switching, but keeping the egress, DNS, browser session and developer tools consistent throughout one workflow.

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Updated: 2026-09-08

This page is a system reference for long-term users and developers. If you only need to create an account, choose a plan, retrieve a subscription and connect a client, start with the Quick Start Guide. If you can connect but encounter regional prompts, login loops, interrupted output or failed calls in AI web apps, desktop applications, APIs or developer tools, use the sections on this page to locate the issue.

Why AI services are sensitive to network conditions

A typical web request ends after the page finishes loading, so a brief egress change may go unnoticed. AI services use a longer interaction chain: the page loads account status and model lists, a persistent response starts after submission, incremental data arrives throughout generation, and the session title, attachment status and usage details may sync at the end. If any step uses a different egress, the result may be more than one failed request: the login session can expire, an answer can stop halfway, an attachment can fail to upload or the interface can retry continuously.

Regional checks involve more than whether the page opens

Services typically assess the egress IP, network type, account session history and information stored by the browser. Being able to open the entry page does not mean login, model calls, file uploads and payment-related pages will receive identical treatment. The browser may also retain cookies, local storage and authorization state from a previous region, so refreshing immediately after switching routes can continue using the old session. A safer approach is to choose a region suitable for the account first, open the browser only after the connection is stable, then log in while keeping the same region and a similar egress type for as long as possible.

A consistent region does not mean all traffic follows the same path. The system proxy may handle only the browser, while a desktop app reads another configuration; a browser extension may rewrite the proxy again, and security software or a corporate network may take over DNS. The result is that the main page comes from one egress while authentication, static assets or real-time responses come from another. During troubleshooting, verify separately that the page appears connected and that the entire application path uses a consistent egress.

Where persistent connections and streaming output fail

ChatGPT, Claude and other web apps commonly use persistent streaming responses. Once established, the connection must remain available throughout generation. Switching between mobile and wireless networks, having the client select a new route, waking from sleep or allowing an energy-saving policy to freeze a browser tab can all rebuild the underlying connection. A short page request may retry automatically, but a stream that has already generated half an answer may not resume seamlessly. The result is a stopped cursor, an error message or a complete answer that never appears.

When Midjourney relies on the Discord ecosystem, message channels, image assets and real-time events must all be considered. Copilot and Cursor may send requests separately through the editor's main process, extension host and terminal child process. What looks like one button can involve several processes. If only some processes read the proxy environment, the chat panel may work while code completion fails, or the editor may log in successfully while terminal calls fail.

Interaction typePrimary network characteristicsCommon symptomsCheck first
Web chatLogin session and persistent responses coexistLogin loop, interrupted outputEgress region, cookies and system time
Attachment handlingUpload and task status are separateUpload completes but processing failsRouting rules and connection persistence
Desktop appMay not inherit the browser proxyWeb works while the app does notSystem proxy and tunnel mode
IDE pluginExtension host sends requests independentlyLogin works but completion failsEditor environment and child processes
APIAuthentication, request body and streaming readsConnection timeout or truncated responseProcess proxy, certificates and retry logic

The core of AI tool access is not constant change, but control over variables. Fix the device, region and route first; confirm that the basic web page and account session work; then add the desktop app, editor or automation task one layer at a time. This order separates unreachable networks, abnormal account states and application configuration errors into verifiable problems, while reducing repeated logins and pointless egress changes.

Sign-up, login and account session management

The account stage is easy to overlook because users often treat the verification page, third-party authorization page and AI service homepage as one process. In reality, authentication may cross several domains and redirects, with the browser preserving temporary state between them. If the egress region changes during the redirect, cookies are blocked or the tab closes before authentication finishes, the callback received by the service may no longer match the original login request. The result can be a return to the login page, a session that remains logged out after authorization or a page that keeps refreshing.

Establish a stable first session

Before signing up or logging in, disable automatic route switching and choose a region you intend to use long term. Keep the connection active, then open a fresh browser window and start from the service's official entry point. Do not submit the same action repeatedly across multiple tabs. When using third-party authorization, keep the authorization page and AI service page in the same browser environment instead of completing one in a regular window and the other in an isolated container or private window. After authorization, wait for the page to return automatically; do not manually remove callback parameters from the address bar.

When some users search for “VPN software,” the real issue is often not an unreachable homepage but an inconsistent region or session during authentication. Switching to more tools usually does not improve the result. A better approach is to keep the current stable route, clear site data for the target service and rebuild the session. Limit the cleanup to the target site and its authentication domains; there is no need to delete all browsing history or reset the password, change devices and change regions at the same time.

Cookies, local storage and account separation

Login state is rarely stored in a single cookie. Page preferences, session indexes, authorization exchanges and client identifiers may be distributed across site data. Deleting one cookie is often not enough to break a login loop, while clearing the entire browser affects other work. Create a separate browser profile or container for each AI account, giving every profile its own cookies, extensions and cache. This reduces account crossover and makes it easier to determine whether an issue comes from browser state.

When switching accounts, do not quickly log out, change routes and log into another account in the same tab. A safer method is to sign out, close the relevant pages, confirm that the route region has not changed and then enter the other isolated profile. If different accounts genuinely require different regions, pair each browser profile with its route choice instead of switching from memory. Rapid jumps between distant regions can make a normal login look like an abnormal session.

Keep device behavior consistent and explainable

The same account may appear on a computer, tablet and development environment at once. VPNLK supports unlimited devices online simultaneously, but the AI service itself may apply its own rules to concurrent sessions. At the network layer, use consistent or nearby regions on regular devices. Do not let a desktop browser stay in one region while a mobile device refreshes the session in the background from another. After a mobile device changes networks, the app may reconnect immediately in the background, creating a change that is harder to notice than a manual refresh.

If login problems occur on only one device, compare device-specific factors first: is the system clock accurate, has the browser disabled required site storage, is an extension rewriting requests, or is DNS controlled by other software? If every device fails at once, then consider the route, account state or service maintenance. Separating a single-device issue from an account-wide issue avoids unnecessary cleanup on devices that work normally.

After recovering an account, complete a short conversation and refresh the page to confirm that the session persists. Only then enable attachments, voice or developer plugins. During recovery, do not immediately open many tabs in parallel or submit the same request repeatedly. A stable session baseline is more informative than one accidental success and provides a clear reference for later troubleshooting.

Connection differences between web apps and desktop applications

Web availability depends on the combination of the browser process, system network, DNS and site data. A desktop app may instead use the system networking framework, a bundled runtime or a separate updater. The graphical interfaces may look similar, but their proxy handling can differ. A common pattern is that ChatGPT or Claude generates normally in the browser while the desktop app remains on its loading screen. The reverse can also happen: the desktop app is logged in, but the browser opened by an external authorization link cannot complete the return.

First determine whether you have a browser proxy or a system tunnel

A browser extension proxy usually affects only requests inside the browser. It is useful for temporarily checking a web issue, but it does not prove that the desktop app, terminal and IDE use the same egress. A system proxy covers more traffic, yet some apps may ignore it and connect directly. Tunnel mode generally captures more processes, but routing rules can still send authentication domains, static assets and real-time APIs along different paths. When troubleshooting a desktop app, prioritize a connection method that covers the entire application process instead of checking only a browser tab.

If the web app works while the desktop app fails, fully quit the app first, including background processes in the menu bar or system tray. Then connect the route and start the app again. Many desktop programs read the system proxy only at startup, so changing it while they are running does not immediately reach existing connections. If a restart fixes the issue, the likely cause is an old connection or the startup environment. If not, check for an app-specific proxy setting, system network permission or certificate configuration.

Browser extensions, privacy settings and cache boundaries

Content blockers, script controls, cookie isolation and user-agent modification extensions can all affect AI pages. You do not need to disable every extension permanently. Create a browser profile without extensions and sign in over the same route for comparison. If the clean profile works, restore only necessary extensions one by one. Pay particular attention to authentication redirects, streaming responses and attachment uploads, not just whether the homepage appears.

Cache cleanup also needs a defined scope. Reloading or clearing the cache may help when static assets fail to load. A login loop points more strongly to cookies and site storage; if the page logs in but answers stop, check connection persistence and routing instead of repeatedly deleting the cache. Blaming every issue on the cache can hide real differences in network paths.

Check DNS and routing together

If the local network resolves the domain while the later connection leaves through an egress in another region, the service may receive inconsistent geographic signals. A subtler case occurs when the main domain follows proxy rules but authentication or asset domains do not. The page framework may appear while the model list, avatar, conversation history or real-time output fails. Check the client's connection logs to confirm that the relevant domains use the expected route instead of relying only on the browser address bar.

ScenarioNetwork settings that may be readHow to verifyRecommended action
Regular browserSystem proxy and browser extensionCompare with an extension-free profileUse one proxy source and clear site state
Desktop appSystem proxy or application runtimeFully restart the app after connectingCheck system permissions and tunnel routing
Mobile appSystem network extensionReconnect after stabilizing the networkAvoid background network changes and power-saving freezes
Authorization returnThe app and default browser both participateCheck whether the return reaches the original appKeep egress and session consistent on both sides

Mobile devices also require attention to network changes and background policies. After an app moves to the background, the system may pause its connection; when reopened, the interface can retain old content while the underlying session has been rebuilt. If the device has just switched from mobile data to Wi-Fi, wait for the connection to stabilize before returning to the conversation. If failures continue, fully end the app process instead of repeatedly tapping retry on the same error page.

For work sessions that need to remain available, keep the AI web app, desktop app and regular browser in one clearly defined configuration. Use a separate browser profile or another device for temporary region tests so the everyday account's cookies and regional history are not polluted. The goal is not to make web and desktop configurations identical, but to ensure that each side's actual egress is explainable and reproducible.

How API calls differ from web apps

A working web app does not guarantee that the API will work. Browser requests handle cookies, redirects, certificates and proxy inheritance, while API clients depend on access keys, request headers, process environment variables, SDK configuration and error handling. Conversely, a successful API call does not prove that the web account is healthy, because they may use different authentication systems, domains and regional policies. Treat them as two independent paths during troubleshooting.

Identify the process actually making the request

Setting a proxy in the command line does not mean that a graphical API tool, background service or editor plugin will inherit it. Environment variables are usually passed only to the current terminal and its child processes; an app launched from a desktop icon may not see them. Containers, remote development environments and CI runners each have their own environment. The most reliable approach is to inspect proxy variables in the same process context that makes the request, then verify connectivity with a health request that contains no business key.

The example below uses a reserved domain to demonstrate environment-variable syntax; it contains no real service address, access key or subscription information. In practice, use the endpoint specified in the relevant AI service's official documentation, and store keys in environment variables or a secrets manager.

export HTTPS_PROXY="http://proxy.example"
export HTTP_PROXY="$HTTPS_PROXY"
export NO_PROXY="localhost"

curl --proxy "$HTTPS_PROXY" \
  --request HEAD \
  "https://example.com/health"

If command-line verification succeeds but the program still fails, check whether the language runtime or request library automatically reads proxy variables. Some libraries require an explicit proxy transport, some read only uppercase variables and others follow the system proxy. When uncertain, do not set several conflicting proxy addresses at once. Read the library's proxy documentation first, then verify with a minimal script to separate business code, authentication and network issues.

Read and cancel streaming responses correctly

AI APIs often return data continuously. If a client waits for a complete JSON response, it may produce nothing until the timeout; an intermediary proxy that buffers responses can also make streamed content appear only at the end. The program should read chunks according to the service specification, handle the normal completion marker and actively close the connection when the user cancels. After a brief network interruption, do not blindly replay a write that the service may already have received, especially for tool calls, file processing or requests with billing implications.

Retry logic should distinguish connection failures, authentication failures, malformed requests, rate limits and temporary server errors. Retrying an authentication failure only creates more anomalous records; a malformed request needs corrected parameters; rate limits require following the response guidance and reducing concurrency; connection errors are suitable for delayed retries only after idempotency is confirmed. Turning every error into “network error” discards the most valuable diagnostic information.

Manage proxy settings and secrets separately

A proxy address and an API key solve different problems. The proxy determines where a request originates; the key determines which identity makes the call. Never put a key in a proxy URL, shell history, public configuration file or frontend code, and do not show complete request headers in screenshots while troubleshooting. In CI, provide credentials through the platform's secret-injection mechanism. Logs should record only the error category, target service and request trace information, never complete keys or user input.

{
  "network": {
    "proxyFromEnvironment": true,
    "streaming": true
  },
  "secrets": {
    "apiKey": "READ_FROM_ENVIRONMENT"
  }
}

Certificate errors should not be bypassed simply by disabling verification. If a corporate network, security tool or local proxy performs TLS inspection, the runtime may not trust its certificate chain. Confirm the inspection source, configure a trusted certificate in a controlled environment or switch to a network path that does not intercept the connection. Disabling certificate checks hides man-in-the-middle and configuration errors and is not suitable as a long-term solution.

When API and web behavior differ, record a minimal comparison: the same device, route and time window, with a browser login and a health request that contains no sensitive information. If only the API fails, continue checking the process proxy, DNS, certificates, endpoint and authentication. If both fail, return to the route and region layers. This layered method is more efficient than repeatedly replacing access keys.

Command-line tools, IDE plugins and CI configuration

Developer workflows often span the local browser, terminal, editor extension, container, remote host and automation runner. They may appear to be in the same project on the same computer, yet have entirely different network namespaces and environment variables. Cursor, Copilot and other AI coding plugins being able to log in proves only that one editor authentication path works. Code completion, chat, indexing and terminal proxying may still run in separate processes.

Confirm the terminal environment from its launch path

Launching the editor from a terminal where proxy variables are set makes it more likely that the editor and child processes inherit the same environment. Launching it directly from the desktop may produce a different result. If “terminal scripts work but the editor plugin fails,” fully quit the editor, launch it from a verified terminal and compare. If that restores service, the issue is process-environment inheritance rather than the account or route. You can then choose between a system-wide proxy, an editor-specific setting or a fixed launch script.

Shell configuration files also load differently. Interactive shells, login shells and task runners may read different files. If the proxy is written only into one interactive configuration, a manually run command may work while an editor task cannot see it. Wrap network settings in an explicit project entry point and provide a matching way to disable them, avoiding variables that remain indefinitely. When returning to a regular network, clear both uppercase and lowercase proxy variables so that no tool continues reading an old value.

export HTTPS_PROXY="http://proxy.example"
export HTTP_PROXY="$HTTPS_PROXY"

code .

unset HTTPS_PROXY
unset HTTP_PROXY

Containers and remote development are not copies of the local network

In a container, localhost points to the container itself, not the host. If the proxy listens only on the host loopback address, the container cannot access it directly. An extension in a remote development environment may also be installed remotely, with the remote machine making the AI request; the local route then has no effect. Check the editor's extension panel, task logs and remote status to determine where the extension runs before configuring the network on the appropriate side.

Handle container build and runtime stages separately. A build may need access to dependency sources, but the running application may not need the same proxy. Hard-coding a proxy into an image layer can cause migrated environments to keep using an old address and may carry internal settings into the artifact. Inject variables at build or startup time instead. After the build, inspect the image history and output files to ensure no credentials or environment-specific addresses remain.

Inspect the IDE extension host logs

A plugin's “connection failed” message is usually too brief. Open the editor's output or developer tools, select the relevant extension channel and determine whether the error involves DNS, certificates, authentication, rate limits or response parsing. Logs may retain error codes and timestamps, but remove access keys, session tokens, file contents and complete requests before sharing. If the plugin supports its own proxy setting, make sure it does not duplicate the system proxy.

Code-indexing features may also access resources beyond the model API, including extension updates, identity authentication and project synchronization. Configuring rules for a single API domain may allow login while indexing fails. Confirm the complete domain set from client logs when setting routing, and avoid overly broad rules that send unrelated traffic through the same path. To review VPNLK regions and route types, visit the Routes page.

Fix the CI environment instead of following the local machine

CI tasks run on independent runners, so a local connection does not change the remote task's egress. First confirm that the runner's region meets the AI API's service requirements, then decide whether a dedicated network path is needed. Inject proxy variables, certificates and keys through protected CI variables; do not place them in the repository. Never print complete environment variables in task logs. For diagnostics, report only whether a variable exists and whether the target host is reachable.

Automation should also control concurrency and failure behavior. A manual editor request can wait and retry, but if several CI jobs call a model simultaneously, service-side rate limits may be triggered quickly. Keep concurrency aligned with the workload and use different exit strategies for rate limits, authentication failures and network errors. If generated output feeds a build or release, verify its completeness rather than treating truncated streaming output as a successful artifact.

The ultimate goal of development-environment configuration is reproducibility. Team documentation should state whether requests originate locally, in a container or remotely; where the proxy is injected; how keys are supplied; and how to run a connection check without sensitive data. New members can then follow a clear path instead of copying system settings from an unknown source.

Choose routes and regions by AI workload

Route selection should not be based on the region name alone. For AI tools, account-region consistency, persistent-connection stability, coordinated DNS and request egress, and the applications in the workflow matter more. A nearby route is often better for interactive chat and code completion, but suddenly changing regions can trigger additional verification if the account has long been used elsewhere. Maintaining the established environment is often more important than chasing one faster response.

Start with account history, then refine by application

For an established account, keep its usual region whenever possible. For a new work environment, choose a region with full service coverage and a reasonable distance from the usual location, then use it consistently across the browser, desktop app and developer tools. Do not test several countries during one session. If comparison is necessary, sign out or use an isolated browser profile and record only one changed variable at a time.

ChatGPT, Claude and Gemini web chats emphasize persistent responses; Copilot and Cursor emphasize frequent small requests and context transfer inside the editor; Midjourney through Discord also involves message events and image assets. A route that reaches the homepage does not necessarily route every supporting domain correctly. After choosing a route, verify login, a short conversation, a longer response and attachments or image assets separately rather than opening only the homepage.

Understanding when to use IEPL, relay and direct routes

IEPL, relay and direct routes describe different ways of organizing a connection, not a fixed speed ranking. IEPL is suited to situations where path stability is the priority. Relay routes optimize the cross-border path through an intermediate access point and are often used to balance coverage with connection continuity. Direct routes are more straightforward, but actual performance changes with the local network and cross-border path. Choose based on the network, target region and application rather than the label alone.

Route typePath characteristicsSuitable scenariosTroubleshooting focus
IEPLPrioritizes cross-border path continuityLong conversations, developer tools and persistent sessionsAccount region and routing consistency
RelayOrganizes cross-border connectivity through an access pathWeb, desktop apps and multi-region selectionStability of the relay entry and target egress
DirectRelatively straightforward path structureBasic access and temporary comparison testsFluctuations in the local network and cross-border path

When long outputs stop frequently while short requests work, first compare different route types in the same region instead of changing the region at the same time. If login fails but the connection is stable afterward, check regional history, cookies and authentication-domain routing. If only attachments or images fail, check whether asset domains use the same path as the main page. Mapping symptoms to connection stages gives route selection a clear basis.

Choosing between global mode and rule-based routing

Global mode is useful for verification because all applications are more likely to use one path, making it a good baseline when the source of a problem is unclear. Rule-based routing is better for long-term use and reduces unrelated traffic, but incomplete rules can split an app's egress internally. First confirm that the account and app work in global mode or another clearly scoped mode, then restore routing rules gradually. After each rule group is restored, verify login, conversations and resource loading.

DNS should be designed together with routing. If proxied requests use remote resolution while non-proxied requests use local resolution, ensure that AI domains and authentication domains fall on the correct side. Copying someone else's rule list without checking local logs can miss new domains or match unrelated services. Client logs directly show which rules matched and should be the source of truth when issues occur.

VPNLK coverage and plan selection

VPNLK covers 120+ countries / 180+ routes and supports Windows / macOS / iOS / Android / Linux, with unlimited devices online simultaneously. Monthly plans include ¥9.9/month with 60GB, ¥18/month with 250GB and ¥28/month with 500GB. Traffic resets monthly on the activation date, and mid-cycle upgrades are prorated by the remaining days. For fixed devices and regular usage, choose by monthly allowance; for variable usage where you want traffic to remain available, see the permanent, non-expiring data packages.

Data packages cost ¥158/300GB, ¥358/1000GB and ¥658/3000GB, remain available until used and never expire. Choose based on actual text interaction, image processing, file uploads and API workload rather than unverifiable averages. See the Plans page for complete rules and payment methods. Payments support Alipay / WeChat Pay / USDT, with a 7-day refund policy.

After choosing a route, save one “known-good” configuration: regular region, route type, client mode, browser profile and DNS strategy. When an issue appears later, return to this baseline first, then determine whether the cause is a service-side change, account state or local configuration. A stable baseline is more valuable to maintain than a large collection of temporary routes.

Causes of account risk controls, bans and rate limits

A ban, additional verification and rate limiting are different problems. Account risk controls examine whether identity and sessions appear abnormal; regional restrictions concern service availability in the current region; rate limits concern request frequency, concurrency and quota; content policies concern submitted and generated content. They may show similar error pages but require completely different responses. When something goes wrong, preserve the original message and context first instead of retrying repeatedly.

Frequent egress changes can amplify session anomalies

Repeated logins from noticeably different regions within a short period, or multiple devices refreshing sessions through different egresses, can trigger additional verification. Changing a route does not itself mean an account will be penalized, but rapid and unexplained changes add risk signals. For regular use, keep common devices in nearby regions. For temporary tests, use an isolated session, sign out afterward and keep it separate from the everyday account state.

A shared egress can also have indirect effects. If an egress generates many abnormal requests, the service may increase verification requirements. During persistent verification, do not jump rapidly among routes. Choose another route in the same region with a more stable type, clear the target site's session and log in again. After switching, maintain a complete work session instead of changing again as soon as the page opens.

Identify rate limits through concurrency and request patterns

Repeated sends in a web app, simultaneous generations in several tabs, concurrent completion requests across IDE workspaces and parallel API calls from CI jobs can all increase request pressure. Rate limits are usually not solved by changing routes because they may be tied to the account, key, project or service plan. Stop duplicate requests, read the error category and recovery guidance, reduce concurrency and use bounded backoff in the application.

Automatic retries require particular care. If every failure is resent immediately, multiple tasks can synchronize their retries and intensify rate limiting. Add a wait and a termination condition to retries; authentication, permission and parameter errors should not be retried automatically. When a streaming request is interrupted, determine whether the service has already started processing it to avoid creating duplicate tasks or repeating tool calls.

Separate account state from network failures

If the same permission prompt appears on every device and every stable route, the issue is more likely the account or service rules. If another browser profile works, the original profile is more likely at fault. If the same account works on the web but not through the API, check API permissions, keys and project status. Cross-comparison narrows the scope more reliably than trying more random egresses.

When users search for “ChatGPT not working,” they often group a blank screen, login loop, regional prompt, rate limit and interrupted stream into one symptom. Effective troubleshooting must record whether the page loads, whether login works, whether the model list appears, whether the request is sent and where the response stops. Each observation points to a different layer; accurate descriptions are what lead to effective action.

Everyday practices for reducing risk

Keep system time synchronized automatically, use a fixed browser profile and avoid repeated logins across multiple windows. After a network change, wait for the connection to stabilize before restoring the session. Give the browser, desktop app and developer tools explainable egresses. Do not share account sessions or access keys. Control concurrency in automated tasks and preserve error categories. These practices do not evade service rules; they reduce interference from abnormal network behavior during normal use.

Development teams should manage accounts and API projects separately by purpose. A personal web account should not become a shared credential for production automation, and CI keys should not be placed in editor settings sync. When a member leaves a project or a key may have been exposed, rotate it according to the provider's process and check logs for abnormal calls. Network stability solves only connection-layer issues; it cannot replace permission and key governance.

For more detail on how ChatGPT differs across sign-up, login and long-term use, read ChatGPT VPN Picks: Hands-on Comparison. For Midjourney with Discord, see Midjourney Connection and Regional Requirements: Hands-on Review. Those articles focus on specific tools; this page provides a cross-tool framework for diagnosis.

A systematic troubleshooting process from symptom to root cause

Effective troubleshooting depends on a fixed order. If you switch routes, clear the browser, change DNS, reinstall the app and reset the account at the same time, even a recovery will not reveal which step worked. The next similar issue will still require starting over. Save the current state and error first, then check reachability, egress consistency, session state, app configuration and account permissions one layer at a time, changing only one variable per step.

Describe the symptom before drawing conclusions

Record the tool, entry point and stage where the issue occurs: is the homepage unreachable, does the login redirect fail, is the model list empty, does the request produce no response, does output stop midway, does an attachment fail or does the API return a clear error? Also record whether it occurs only on one device, browser profile, account or route type. An accurate description quickly eliminates many irrelevant directions.

Do not write only “it won't connect” or “it's slow.” A blank homepage may mean static assets or scripts failed; a login loop may involve cookies or an authentication callback; a stalled generation may be a broken persistent connection; an unavailable plugin may not have inherited the proxy; a CI failure may mean the remote runner never used the local network. Similar symptoms can have completely different causes.

Build a minimal working baseline

Choose one regular device, one stable route and one clean browser profile. Disable extra proxy extensions and verify only the target service's official web entry point. Once the page loads, log in, start a short plain-text conversation and refresh the page to confirm the session remains. If this minimal path still fails, continue with the route, DNS, system time and account prompt. If it succeeds, add the desktop app, attachments, IDE or API one at a time.

For a route comparison, keep the same region and change only the route type. For a regional comparison, keep the browser profile and app unchanged. For a browser comparison, use a new profile instead of clearing all data. This gives each step a clear variable and shows whether the issue comes from the path, session or application.

Choose an action based on the error layer

Observed symptomPriority layerRecommended actionDo not do first
Homepage and resources both fail to loadNetwork and DNSCheck client logs and domain routingReset the account password
Returns to the login page after authorizationBrowser sessionFix the region and clear relevant site dataSubmit authorization repeatedly
Short answers work; long output stopsConnection persistenceKeep the network fixed and compare routes in the same regionSwitch regions repeatedly
Web works; desktop app failsApplication networkFully restart the app after connectingClear all browser data
Terminal works; IDE plugin failsProcess environmentCheck the extension host and proxy inheritanceReplace the API key
API returns a permission or rate-limit promptAccount and calling policyVerify permissions, concurrency and error typeTreat every error as a timeout

If the client shows connected but the target app still uses the original network, check rule matches, the system proxy and the app's bypass settings. If the browser and terminal show different egresses, they are not using the same network path. If DNS resolution is abnormal, first check whether multiple network tools are taking control at once. Keeping one primary connection configuration active reduces loops and conflicts.

Keep diagnostic information safe to share

When contacting support, provide the operating system, client platform, route region and type, affected tool, stage, error text and steps already attempted. Hide usernames, cookies, access keys, subscription URLs, project content and billing information before taking screenshots. Do not send a complete configuration file; share only the sections related to rule matching or errors, and confirm that they contain no credentials.

VPNLK supports Windows / macOS / iOS / Android / Linux. Obtain the client and subscription from the logged-in user panel; do not copy installers or subscription URLs from unknown pages. If the import process is unfamiliar, read the Complete Subscription Link Guide first. macOS users can see macOS: From Installation to Connection Verification.

Run a regression check after recovery

Recovery does not mean troubleshooting is finished. Recheck login, a short conversation, a longer output, page refresh and commonly used plugins to make sure the success was not accidental. Record the working configuration, then remove temporary proxies, debugging certificates and extra environment variables added during diagnosis. If routing rules caused the issue, save the final match scope. If browser state caused it, keep the independent profile instead of returning to a mixed setup.

For recurring failures, record the trigger: does it occur only after the device wakes from sleep, only after switching mobile networks or only on a remote runner? Once the trigger is clear, move the response earlier: rebuild the connection after wake, check the egress before running automation and launch the editor from a fixed terminal. The value of systematic maintenance is turning occasional failures into predictable, reproducible and manageable procedures.

To reconfigure from the shortest path, return to the Quick Start Guide. To compare monthly subscriptions with permanent, non-expiring data packages, see the Plan Details. This page works as a reference index when problems occur and can also help organize AI network-environment standards for a team.

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