Extention Host - Timed out or unresponsive

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1

The agent execution provider did not respond within 16 seconds. This may indicate the extension host is not running or is unresponsive. Any help would be much much appreciated.

On A chromebook running Lubuntu. Was working fine when it all of a sudden stopped working. Cursor still works on all my other devices. Unsure of what is going on or how to fix.

Request ID: 3be1531b-1329-4c45-97bc-bc2f2f2ce3c7
{“error”:“ERROR_CUSTOM”,“details”:{“title”:“Agent Execution Timed Out”,“detail”:“The agent execution provider did not respond within 16 seconds. 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/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:11431:8256
at async sWf.createExecInstance (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:11431:6308)
at async dMg (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:529:549852)
at async _W.execute (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9095:16084)
at async l1a.execute (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:11431:1205)
at async Pcb.execute (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34235:14275)
at async jpc.buildComposerRequestContext (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34245:3573)
at async jpc.streamFromAgentBackend (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34245:5171)
at async jpc.getAgentStreamResponse (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34245:8436)
at async FTe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9170:14623)
at async Object.Ei [as onSubmit] (vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:32994:3808)
at async vscode-file://vscode-app/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:32968:59730

2

Hi there!

We detected that this may be a bug report, so we’ve moved your post to the Bug Reports category.

To help us investigate and fix this faster, could you edit your original post to include the details from the template below?

Bug Report Template - Click to expand

Where does the bug appear (feature/product)?

  • Cursor IDE
  • Cursor CLI
  • Background Agent (GitHub, Slack, Web, Linear)
  • BugBot
  • Somewhere else…

Describe the Bug
A clear and concise description of what the bug is.

Steps to Reproduce
How can you reproduce this bug? We have a much better chance at fixing issues if we can reproduce them!

  1. …
  2. …
  3. …

Expected Behavior
What is meant to happen here that isn’t working correctly?

Screenshots / Screen Recordings
If applicable, attach images or videos (.jpg, .png, .gif, .mp4, .mov)

Operating System

  • Windows 10/11
  • MacOS
  • Linux

Version Information

  • For Cursor IDE: Menu → About Cursor → Copy
  • For Cursor CLI: Run agent about in your terminal
IDE:
Version: 2.xx.x
VSCode Version: 1.105.1
Commit: ......

CLI:
CLI Version 2026.01.17-d239e66

For AI issues: which model did you use?
Model name (e.g., Sonnet 4, Tab…)

For AI issues: add Request ID with privacy disabled
Request ID: f9a7046a-279b-47e5-ab48-6e8dc12daba1
For Background Agent issues, also post the ID: bc-…

Additional Information
Add any other context about the problem here.

Does this stop you from using Cursor?

  • Yes - Cursor is unusable
  • Sometimes - I can sometimes use Cursor
  • No - Cursor works, but with this issue

The more details you provide, the easier it is for us to reproduce and fix the issue. Thanks!

4

Hey, thanks for the report. This looks like an extension host issue that existed in versions 2.4.12 to 2.4.14.

What Cursor version are you on? (Menu > About Cursor > Copy)

If it’s 2.4.12 to 2.4.14, please roll back to 2.3.37 here: Download · Cursor (scroll to the bottom for Previous versions).

If you’re on a different version, please try:

  • Fully reinstall Cursor
  • Check you have enough free disk space (updates can break if you’re low on space)
  • If you use any Lubuntu-specific extensions, try launching with cursor --disable-extensions

Let me know your version and what happens. If the issue is still there, we’ll keep digging.

5

Thanks for the quick reply. I was able to get it working again, but I am not particularly sure how. My guess is that it has something to do with the file sharing network i recently set up. When I am connected it times out but when I am not it seems to work okay.

7

Glad it worked. Sounds like a file sharing network issue, which is an interesting clue.

To figure out the root cause:

  1. What Cursor version are you on? (Menu > About Cursor > Copy)
  2. What kind of file sharing are you using (SMB, NFS, or something else)?
  3. Is the project stored on a network drive or locally?

A couple known issues:

  • If you’re on 2.4.12 to 2.4.14, there was an Extension Host bug. Rolling back to 2.3.37 helped. Download · Cursor (scroll down to Previous versions)
  • If the project is on an NFS-mounted directory, the Extension Host can lag due to network latency

Try this:

  • Open the project from a local disk (not a network drive) and see if you still hit the timeout
  • If you’re on 2.4.12 to 2.4.14, roll back

Let me know your version and what you find, and we can narrow it down.