Timeout error ERROR_EXTENSION_HOST_TIMEOUT

Support Bug Reports
,
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Request ID: 99a58da8-318f-49c4-b2ce-faf142820148
{“error”:“ERROR_EXTENSION_HOST_TIMEOUT”,“details”:{“title”:“Agent Execution Timed Out”,“detail”:“The agent execution provider did not respond in time. This may indicate the extension host is not running or is unresponsive.”,“isRetryable”:false,“shouldShowImmediateError”:true,“additionalInfo”:{},“buttons”:[{“label”:“Reload Window”,“reloadWindow”:{}}],“planChoices”:}}
Agent Execution Timed Out [deadline_exceeded]
ConnectError: [deadline_exceeded] Agent Execution Timed Out
at vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:27166
at async RlS.createExecInstance (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:23636)
at async EF_ (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28640:630571)
at async BF.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28861:7896)
at async Wpd.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:1792)
at async vHS.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41234:4969)
at async Dkd.buildComposerRequestContext (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:4190)
at async Dkd.streamFromAgentBackend (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:6959)
at async Dkd.getAgentStreamResponse (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:17740)
at async F3e.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28972:16809)
at async Object.La [as onSubmit] (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:40227:4231)
at async vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:40226:100561

Steps to Reproduce

Request ID: 99a58da8-318f-49c4-b2ce-faf142820148
{“error”:“ERROR_EXTENSION_HOST_TIMEOUT”,“details”:{“title”:“Agent Execution Timed Out”,“detail”:“The agent execution provider did not respond in time. This may indicate the extension host is not running or is unresponsive.”,“isRetryable”:false,“shouldShowImmediateError”:true,“additionalInfo”:{},“buttons”:[{“label”:“Reload Window”,“reloadWindow”:{}}],“planChoices”:}}
Agent Execution Timed Out [deadline_exceeded]
ConnectError: [deadline_exceeded] Agent Execution Timed Out
at vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:27166
at async RlS.createExecInstance (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:23636)
at async EF_ (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28640:630571)
at async BF.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28861:7896)
at async Wpd.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:38239:1792)
at async vHS.execute (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41234:4969)
at async Dkd.buildComposerRequestContext (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:4190)
at async Dkd.streamFromAgentBackend (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:6959)
at async Dkd.getAgentStreamResponse (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:41244:17740)
at async F3e.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:28972:16809)
at async Object.La [as onSubmit] (vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:40227:4231)
at async vscode-file://vscode-app/c:/Program%20Files/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:40226:100561

Operating System

Windows 10/11

Version Information

Version: 3.1.10 (system setup)
VSCode Version: 1.105.1
Commit: dacbe9b31599a253763e4910eb6ab38704653320
Date: 2026-04-13T11:39:16.806Z
Layout: editor
Build Type: Stable
Release Track: Default
Electron: 39.8.1
Chromium: 142.0.7444.265
Node.js: 22.22.1
V8: 14.2.231.22-electron.0
OS: Windows_NT x64 10.0.20348

Does this stop you from using Cursor

Yes - Cursor is unusable

5

Hey, this is a known issue with extension host initialization on Windows. The team is aware, but there’s no ETA yet.

Try this:

  1. Check the cursor-socket folder. Open PowerShell as admin and run:

    dir "$env:LOCALAPPDATA\Programs\cursor\resources\app\extensions\cursor-socket"

    If you see a dist\ folder but no out\, create a symlink:

    cd "$env:LOCALAPPDATA\Programs\cursor\resources\app\extensions\cursor-socket"
New-Item -ItemType SymbolicLink -Name "out" -Target "dist"

    Restart Cursor. This workaround helped another user with the exact same error earlier today, thread here: Agent Execution Time Out

  2. If that didn’t help, clear the cache. Fully close Cursor, then delete:

    • %APPDATA%\Cursor\CachedData
    • %APPDATA%\Cursor\Cache
    • %APPDATA%\Cursor\GPUCache

    Launch Cursor again.

  3. Last resort, rename %APPDATA%\Cursor to Cursor_backup and start Cursor with a clean config.

Let me know what worked, or what didn’t.