Connection Error on 2025-12-27 1:38 PM

nic_code · December 27, 2025, 6:38pm

I quitted my VPN and my network is stable, but I got a Connection error.

Request ID: 16958604-8db2-4efb-95d9-b9a57385dea1

Text: Connection failed. If the problem persists, please check your internet connection or VPN

Tried rerunning the prompt a few times still got the Error

nic_code · December 27, 2025, 6:42pm

Screenshot 2025-12-27 133241

Providing a screenshot of error

deanrie · December 27, 2025, 7:36pm

Hey, thanks for the report.

This is a known HTTP/2 issue. Please try:

Settings (CTRL+,) → search for “HTTP/2” → enable “Disable HTTP/2” → restart Cursor
Settings → Network → Run Diagnostics → send a screenshot of the results
If you’re using a proxy, firewall, or SSL inspection (Zscaler, etc.), try again without them
Test without extensions: run cursor --disable-extensions from the command line

If the issue still happens after disabling HTTP/2, please share:

Your Cursor version (Help → About → Copy)
Errors from Help → Toggle Developer Tools → Console

Related threads: Constant connection error and Repeatedly says connection issue when my connection is fine

Let me know if this helps.

Casey_Salmon · December 28, 2025, 12:48am

this happens on almost all instances where im using the agent… even simple tasks crash out… at first i thought it was a context thing now im just confused… this has broken a few builds because it scraps partial code in where it fails. I dont have a way to disable http/2 here are my http2 logs [2025-12-28T00:45:40.525Z] Start
[2025-12-28T00:45:40.669Z] Host: api2.cursor.sh
[2025-12-28T00:45:40.669Z] Protocol: h2
[2025-12-28T00:45:40.669Z] Result: true in 144ms

deanrie · December 28, 2025, 7:16am

Got it, the Agent crashes even on simple tasks and messes up the code. Let’s dig in:

Cursor version: Help > About > Copy. What version are you on? The “Disable HTTP/2” option should show up in Settings CMD/CTRL+, when you search for “HTTP/2”.
Console errors: Help > Toggle Developer Tools > Console. Please send a screenshot of the errors right when the Agent crashes.
Partial code issue: Can you share an example of how the Agent “scraps partial code”? A screenshot or a short description would help.

Your HTTP/2 diagnostic looks good (Protocol: h2, Result: true), so the issue might be elsewhere. More details will help narrow it down.

Let me know if you can share these.

nic_code · December 28, 2025, 2:34pm

Errors:

This document requires ‘TrustedScript’ assignment.
(anonymous) @ workbench.desktop.main.js:542
workbench.desktop.main.js:542 The JavaScript Function constructor does not accept TrustedString arguments. See Trusted Types for function constructor · w3c/trusted-types Wiki · GitHub for more information.
workbench.desktop.main.js:139 Refused to create a TrustedTypePolicy named ‘tokenizeToString’ because a policy with that name already exists and the Content Security Policy directive does not ‘allow-duplicates’: “trusted-types amdLoader
cellRendererEditorText
defaultWorkerFactory
diffEditorWidget
diffReview
domLineBreaksComputer
dompurify
editorGhostText
editorViewLayer
notebookRenderer
stickyScrollViewLayer
tokenizeToString
safeInnerHtml
editorCppGhostText
standaloneColorizer
tokenizeToString
solidjs
aibubble
aibubble2
aibubbleSearch
streamingMarkdownPolicy
notebookChatEditController
mermaidDiagram
mermaidDiagram2
mermaidDiagramOuter”.
SQ @ workbench.desktop.main.js:139
workbench.desktop.main.js:23 Uncaught Error: Failed to execute ‘createPolicy’ on ‘TrustedTypePolicyFactory’: Policy with name “tokenizeToString” already exists.

TypeError: Policy with name “tokenizeToString” already exists.
at SQ (workbench.desktop.main.js:139:11057)
at workbench.desktop.main.js:12033:49688
at SQ (workbench.desktop.main.js:139:11057)
at workbench.desktop.main.js:12033:49688
at workbench.desktop.main.js:25:12
workbench.desktop.main.js:55 WARN Missing property “rpcFileLoggerFolder” in oldValue. Filling with value from initValue. Please add a migration if necessary.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘ms-toolsai.datawrangler’ wants API proposal ‘debugFocus’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘ms-vscode.vscode-copilot-data-analysis’ wants API proposal ‘chatVariableResolver’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘ms-python.python’ wants API proposal ‘terminalShellType’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘ms-python.vscode-python-envs’ wants API proposal ‘terminalShellType’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘github.copilot-chat’ wants API proposal ‘chatReadonlyPromptReference’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘ms-azuretools.vscode-azure-github-copilot’ wants API proposal ‘lmTools’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘vscjava.vscode-java-pack’ wants API proposal ‘lmTools’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘apidev.azure-api-center’ wants API proposal ‘chatParticipant’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Via ‘product.json#extensionEnabledApiProposals’ extension ‘apidev.azure-api-center’ wants API proposal ‘languageModels’ but that proposal DOES NOT EXIST. Likely, the proposal has been finalized (check ‘vscode.d.ts’) or was abandoned.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “chat." doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN SettingsEditor2: Settings not included in settingsLayout.ts: crashReporting.enabled, testRunner.config, cursorAuth.allowedTeamId
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern "chat.” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN [ms-python.python]: Cannot register ‘python.venvPath’. This property is already registered.
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “chat." doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern "chat.” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN No search provider registered for scheme: file, waiting
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “chat." doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern "chat.” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “chat." doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern "chat.” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:12343 [Extension Host] Git installation not found.
Thf @ workbench.desktop.main.js:12343
workbench.desktop.main.js:55 ERR [Extension Host] (node:10616) [DEP0040] DeprecationWarning: The punycode module is deprecated. Please use a userland alternative instead.
(Use Cursor --trace-deprecation ... to show where the warning was created)
error @ workbench.desktop.main.js:55
workbench.desktop.main.js:12343 [Extension Host] (node:10616) [DEP0040] DeprecationWarning: The punycode module is deprecated. Please use a userland alternative instead.
(Use Cursor --trace-deprecation ... to show where the warning was created)
Thf @ workbench.desktop.main.js:12343
workbench.desktop.main.js:55 WARN Settings pattern “chat." doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:13258 Failed to get git telemetry attributes: Error: Git API not found
getGitAttributes @ workbench.desktop.main.js:13258
workbench.desktop.main.js:15042 Error getting git root Error: Git API not found
isRepoReadyForBackgroundComposer @ workbench.desktop.main.js:15042
workbench.desktop.main.js:55 WARN Settings pattern "chat.” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “mcp” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:55 WARN Settings pattern “GitHub.copilot.manageExtension” doesn’t match any settings
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:13074 [transport] Connect error in unary AI connect ConnectError: [deadline_exceeded] the operation timed out
at t (workbench.desktop.main.js:12375:457550)
at async Object.checkNumberConfig (workbench.desktop.main.js:585:88139)
at async workbench.desktop.main.js:13105:3935
at async n (workbench.desktop.main.js:13105:3694)
at async Mfo.maybeRefreshConfigInner (workbench.desktop.main.js:13105:3918)
at async Mfo.getLatestConfig (workbench.desktop.main.js:13105:3307) Object
error @ workbench.desktop.main.js:13074
workbench.desktop.main.js:55 WARN [ExtensionService] No inspect port found for LocalProcess pid: 10616
warn @ workbench.desktop.main.js:55
workbench.desktop.main.js:13074 [composer] Extension host became UNRESPONSIVE undefined Object
error @ workbench.desktop.main.js:13074
workbench.desktop.main.js:13074 [composer] IndexingProvider.getRepoInfo timed out Object
_log @ workbench.desktop.main.js:13074
workbench.desktop.main.js:13074 [composer] IndexingProvider.getRepoInfo timed out Object
_log @ workbench.desktop.main.js:13074
workbench.desktop.main.js:13074 [transport] Connect error in unary AI connect ConnectError: [unauthenticated] You must be a team member to access this resource
at t (workbench.desktop.main.js:12375:457550)
at async Object.getTeamCommands (workbench.desktop.main.js:585:88139)
at async vMo.loadTeamCommands (workbench.desktop.main.js:15030:2986) Object
error @ workbench.desktop.main.js:13074
workbench.desktop.main.js:15030 Failed to load team commands: ConnectError: [unauthenticated] You must be a team member to access this resource
at t (workbench.desktop.main.js:12375:457550)
at async Object.getTeamCommands (workbench.desktop.main.js:585:88139)
at async vMo.loadTeamCommands (workbench.desktop.main.js:15030:2986)
loadTeamCommands @ workbench.desktop.main.js:15030
workbench.desktop.main.js:13074 [transport] Connect error in unary AI connect ConnectError: [deadline_exceeded] the operation timed out
at t (workbench.desktop.main.js:12375:457550)
at async Object.checkNumberConfig (workbench.desktop.main.js:585:88139)
at async workbench.desktop.main.js:13105:3935
at async n (workbench.desktop.main.js:13105:3694)
at async Mfo.maybeRefreshConfigInner (workbench.desktop.main.js:13105:3918)
at async Mfo.getLatestConfig (workbench.desktop.main.js:13105:3307) Object
error @ workbench.desktop.main.js:13074
workbench.desktop.main.js:55 ERR [Extension Host] [otel.error] {“stack”:“OTLPExporterError: Bad Request\n\tat IncomingMessage. (c:\Program Files\cursor\resources\app\node_modules\@opentelemetry\otlp-exporter-base\build\src\transport\http-transport-utils.js:52:31)\n\tat IncomingMessage.emit (node:events:531:35)\n\tat endReadableNT (node:internal/streams/readable:1698:12)\n\tat process.processTicksAndRejections (node:internal/process/task_queues:90:21)”,“message”:“Bad Request”,“code”:“400”,“name”:“OTLPExporterError”,“data”:“{“error”:“Trace spans collection is not enabled for this user”}”}
error @ workbench.desktop.main.js:55
workbench.desktop.main.js:12343 [Extension Host] [otel.error] {“stack”:“OTLPExporterError: Bad Request\n\tat IncomingMessage. (c:\Program Files\cursor\resources\app\node_modules\@opentelemetry\otlp-exporter-base\build\src\transport\http-transport-utils.js:52:31)\n\tat IncomingMessage.emit (node:events:531:35)\n\tat endReadableNT (node:internal/streams/readable:1698:12)\n\tat process.processTicksAndRejections (node:internal/process/task_queues:90:21)”,“message”:“Bad Request”,“code”:“400”,“name”:“OTLPExporterError”,“data”:“{“error”:“Trace spans collection is not enabled for this user”}”}
Thf @ workbench.desktop.main.js:12343

cursor ver:

Version: 2.2.44 (system setup)
VSCode Version: 1.105.1
Commit: 20adc1003928b0f1b99305dbaf845656ff81f5d0
Date: 2025-12-24T21:41:47.598Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

nic_code · December 28, 2025, 2:38pm

[transport] Connect error in unary AI connect ConnectError: [deadline_exceeded] the operation timed out
at t (workbench.desktop.main.js:12375:457550)
at async Object.checkNumberConfig (workbench.desktop.main.js:585:88139)
at async workbench.desktop.main.js:13105:3935
at async n (workbench.desktop.main.js:13105:3694)
at async Mfo.maybeRefreshConfigInner (workbench.desktop.main.js:13105:3918)
at async Mfo.getLatestConfig (workbench.desktop.main.js:13105:3307) Object

latest that I’ve got:

Error getting git root Error: Git API not found

Extension Host] [otel.error] {“stack”:“OTLPExporterError: Bad Request\n\tat IncomingMessage. (c:\Program Files\cursor\resources\app\node_modules\@opentelemetry\otlp-exporter-base\build\src\transport\http-transport-utils.js:52:31)\n\tat IncomingMessage.emit (node:events:531:35)\n\tat endReadableNT (node:internal/streams/readable:1698:12)\n\tat process.processTicksAndRejections (node:internal/process/task_queues:90:21)”,“message”:“Bad Request”,“code”:“400”,“name”:“OTLPExporterError”,“data”:“{“error”:“Trace spans collection is not enabled for this user”}”}

nic_code · December 28, 2025, 2:39pm

About that, I can’t find it in settings, I am using Windows 11 pro

deanrie · December 28, 2025, 4:25pm

Thanks for the extra info.

Option 1: Disable HTTP/2 via settings.json

CTRL+Shift+P > Preferences: Open User Settings (JSON)
Add: “cursor.general.disableHttp2”: true
Restart Cursor

Option 2: Check extensions
Your errors show “Extension host became UNRESPONSIVE”, which could be the root cause:

Run cursor --disable-extensions from your terminal
If that helps, find the problematic extension: Settings > Extensions > try disabling them one by one (especially Java-related extensions)

Network Diagnostics: Open Cursor settings Ctrl+Shift+J > Network > Run Diagnostics and send the results.

@Casey_Salmon: Same steps for you. Your HTTP/2 diagnostics show Protocol: h2, Result: true, but the timeouts point to an extension host issue.

Let me know what helps.

Casey_Salmon · December 28, 2025, 9:40pm

my option 1 is already set like that, i also tried adjusting to http 1.0, 1.1 and 2 but i get the same connection error. I put the error into the cursor and it said this happens and its a known issue lol. It gets so frustrating when your running a fix on something and it errors out 9 out of 10 times and your unsure what wasnt done right…. you wind up chasing errors all over the place.

nic_code · December 28, 2025, 10:16pm

Tried already but didn’t work

nic_code · December 28, 2025, 10:23pm

Everything is a ok and I weird foo response on Chat and Agent

Chat:

[2025-12-28T22:15:56.903Z] Starting streamSSE
[2025-12-28T22:15:58.010Z] Response: ‘foo’ in 1103ms
[2025-12-28T22:15:59.085Z] Response: ‘foo’ in 1075ms
[2025-12-28T22:16:00.318Z] Response: ‘foo’ in 1233ms
[2025-12-28T22:16:01.317Z] Response: ‘foo’ in 999ms
[2025-12-28T22:16:02.317Z] Response: ‘foo’ in 1000ms
[2025-12-28T22:16:03.318Z] Result: true

Agent:

[2025-12-28T22:15:56.906Z] Starting stream
[2025-12-28T22:15:56.907Z] Pushing first message
[2025-12-28T22:15:58.135Z] Response: ‘foo’ in 1228ms
[2025-12-28T22:15:58.645Z] Pushing next message
[2025-12-28T22:15:59.034Z] Response: ‘foo’ in 899ms
[2025-12-28T22:15:59.534Z] Pushing next message
[2025-12-28T22:15:59.834Z] Response: ‘foo’ in 800ms
[2025-12-28T22:16:00.345Z] Pushing next message
[2025-12-28T22:16:00.634Z] Response: ‘foo’ in 800ms
[2025-12-28T22:16:01.140Z] Pushing next message
[2025-12-28T22:16:01.434Z] Response: ‘foo’ in 800ms
[2025-12-28T22:16:01.434Z] Result: true

Marketplace:

[2025-12-28T22:15:56.897Z] Host: marketplace.cursorapi.com
[2025-12-28T22:15:56.949Z] Response in 52ms
[2025-12-28T22:15:56.950Z] Response: 200
[2025-12-28T22:15:56.950Z] Response Type: cors
[2025-12-28T22:15:56.950Z] Server: null
[2025-12-28T22:15:56.950Z] Result: OK in 53ms

Ping:

[2025-12-28T22:15:56.901Z] Sending ping 1
[2025-12-28T22:15:58.011Z] Response: ‘ping’ in 1110ms
[2025-12-28T22:15:58.011Z] Sending ping 2
[2025-12-28T22:15:58.339Z] Response: ‘ping’ in 328ms
[2025-12-28T22:15:58.339Z] Sending ping 3
[2025-12-28T22:15:58.593Z] Response: ‘ping’ in 254ms
[2025-12-28T22:15:58.593Z] Sending ping 4
[2025-12-28T22:15:58.918Z] Response: ‘ping’ in 325ms
[2025-12-28T22:15:58.918Z] Sending ping 5
[2025-12-28T22:15:59.159Z] Response: ‘ping’ in 241ms
[2025-12-28T22:15:59.159Z] Result: true

API:

[2025-12-28T22:15:56.900Z] Start
[2025-12-28T22:15:57.968Z] Result: true

SSL:

[2025-12-28T22:15:56.898Z] Start
[2025-12-28T22:15:57.859Z] URL: https://api2.cursor.sh/
[2025-12-28T22:15:57.859Z] Status: 200
[2025-12-28T22:15:57.859Z] IP: 54.243.161.175
[2025-12-28T22:15:57.859Z] Issuer: C=US; O=Amazon; CN=Amazon RSA 2048 M01
[2025-12-28T22:15:57.859Z] Name: api2.cursor.sh
[2025-12-28T22:15:57.859Z] AltName: DNS:api2.cursor.sh, DNS:prod.authentication.cursor.sh, DNS:*.api2.cursor.sh
[2025-12-28T22:15:57.859Z] DNS Time: 14ms
[2025-12-28T22:15:57.859Z] Connect Time: 250ms
[2025-12-28T22:15:57.859Z] TLS Time: 555ms
[2025-12-28T22:15:57.859Z] Result: true in 961ms

DNS:

[2025-12-28T22:15:56.938Z] Host: api2.cursor.sh
[2025-12-28T22:15:56.938Z] Servers: 192.168.1.1
[2025-12-28T22:15:56.938Z] Resolved to 54.243.161.175 in 25ms
[2025-12-28T22:15:57.040Z] Resolved to 54.243.161.175 in 16ms
[2025-12-28T22:15:57.558Z] Resolved to 54.243.161.175 in 395ms
[2025-12-28T22:15:57.877Z] Resolved to 54.243.161.175 in 127ms
[2025-12-28T22:15:58.004Z] Host: api2.cursor.sh
[2025-12-28T22:15:58.004Z] Servers: system
[2025-12-28T22:15:58.004Z] Resolved to 52.2.40.148, 3.230.99.27, 98.91.135.254, 100.52.131.34, 54.156.154.21, 44.219.131.80, 54.83.140.254, 50.16.161.49 in 39ms
[2025-12-28T22:15:58.005Z] Resolved to 52.2.40.148, 3.230.99.27, 98.91.135.254, 100.52.131.34, 54.156.154.21, 44.219.131.80, 54.83.140.254, 50.16.161.49 in 0ms
[2025-12-28T22:15:58.007Z] Resolved to 52.2.40.148, 3.230.99.27, 98.91.135.254, 100.52.131.34, 54.156.154.21, 44.219.131.80, 54.83.140.254, 50.16.161.49 in 1ms
[2025-12-28T22:15:58.017Z] Resolved to 52.2.40.148, 3.230.99.27, 98.91.135.254, 100.52.131.34, 54.156.154.21, 44.219.131.80, 54.83.140.254, 50.16.161.49 in 1ms
[2025-12-28T22:15:58.017Z] Result: true

Those are the logs in the Diagnostics, and everything is a ok on the tests

nic_code · December 28, 2025, 10:24pm

nic_code · December 28, 2025, 10:25pm

recent retry Request ID: 16958604-8db2-4efb-95d9-b9a57385dea1
ConnectError: [internal] Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools
at vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:12375:452121

deanrie · December 29, 2025, 6:29am

Thanks for the clarification. Yes, the error Serialization error in aiserver.v1.StreamUnifiedChatRequestWithTools is a known bug related to an int32 overflow. The team is working on a fix.

Temporary workarounds:

Create a new chat - after the error appears, the current chat gets “broken,” but a new chat should work
Restart Cursor - if a new chat doesn’t help
Avoid PowerShell pipelines with truncation (on Windows):
- Don’t use | Select-Object -First N with external commands
- This can cause exit code -1, which triggers the bug

Topic		Replies	Views
Connection failed msg Help	5	87	January 11, 2026
Stuck with timeouts? Help java	47	2269	January 31, 2026
Connection Error (Unavailable) Bug Reports java	6	68	January 29, 2026
Cursor stops working - Connection Error Bug Reports java	119	4513	January 12, 2026
SOLUTION NEEDED: We’re having trouble connecting to the model provider. This might be temporary - please try again in a moment Bug Reports	27	541	January 30, 2026

Connection Error on 2025-12-27 1:38 PM

Related topics