A connection interruption prompt appears when sending a message

Support Bug Reports
1

image
image641×191 5.34 KB
，After confirming that the network was fine, it couldn’t be used after the update. Even after re-downloading, it still didn’t work.

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

  1. I am using Cursor IDE.

  2. After sending a message in the Chat panel, it shows “Connection stalled / Connection interrupted”.

  3. The chat request does not return any response and eventually times out.

  4. Operating System: Windows 10.

  5. Version information:

    • Cursor Version: 2.4.21 (User Setup)

    • VS Code Version: 1.105.1

    • Commit: dc8361355d709f306d5159635a677a571b277bc0

    • Date: 2026-01-22T16:57:59.675Z

    • Build Type: Stable

    • Release Track: Default

    • Electron: 39.2.7

    • Chromium: 142.0.7444.235

    • Node.js: 22.21.1

    • V8: 14.2.231.21-electron.0

    • OS: Windows_NT x64 10.0.19045

  6. The issue occurs with both Models Auto and Claude Sonnet 4.5.

  7. Error message and stack trace:

Request ID: a0a526ba-074c-4de2-9aa9-bbb8cc6887e7
Connection stalled
at $mf (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9096:4764)
at ova.run (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9096:8170)
at async qyt.runAgentLoop (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34190:57047)
at async Wpc.streamFromAgentBackend (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34239:7695)
at async Wpc.getAgentStreamResponse (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34239:8436)
at async FTe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9170:14575)
at async Object.Oi [as onSubmit] (vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:32991:3808)
at async vscode-file://vscode-app/d:/tools/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:32965:59943
5

Hey, thanks for the report. I’m seeing the same stack trace in a few recent cases.

Try this workaround that helped other users with the exact same error:

  1. Rename the project folder in File Explorer (for example MyProject → MyProject_v2)
  2. Open the renamed folder in Cursor

This resets a corrupted local index. Here are two resolved threads with the same stack trace: Connection Error / Stalled Agent requests for hours - #9 by Fares_Bendhiab and Connection error, again and again.

If that doesn’t help, please share:

  • Network Diagnostics: Cursor Settings > Network > Run Diagnostics (screenshot)
  • Console errors: Help > Toggle Developer Tools > Console (screenshot if you see any red errors)
  • Are you using a corporate VPN or firewall (Zscaler, McAfee, etc.)?

The team is aware of this issue. Over the past few days, a few users have reported the same stack trace.

Let me know if this helps.

7

Hey @jiawei_zheng, just checking in. If you’re still experiencing the “Connection stalled” error, please share the diagnostics info requested and we can dig deeper. Also, since you’re on version 2.4.21, it’s worth updating to the latest version as there have been several fixes since then.