Connection failed on Mac without VPN – Request ID 5b4e1327-0ed5-4c3e-a8be-8e0971fdc019

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I regularly get a Connection failed error when using Cursor. The error suggests checking my internet connection or VPN, but my connection is stable and I do not use any VPN.

Steps to Reproduce

  1. Open Cursor IDE
  2. Try to perform an action that requires internet connection (e.g., AI feature, code analysis, or sync)
  3. Observe the “Connection failed” error message
  4. Error message appears despite stable internet connection and no VPN being used

Expected Behavior

The AI features should work properly without showing “Connection failed” error when using Cursor IDE. All AI-related features should be accessible and functional without any false connection errors.

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 0.42.4
VSCode Version: 1.95.2
Commit: a1676144d8f8a65a198ad766f6e7b00d62b1f6e8

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report.

Please check:

  • Disable HTTP/2: Settings CMD+, → search “HTTP” → enable “Disable HTTP/2” → restart Cursor → test in a new chat. Confirmed fix: Connection failed. If the problem persists, please check your internet connection or VPN
  • Settings → Network → Run Diagnostics → send a screenshot.
  • Launch without extensions: in the terminal run cursor --disable-extensions → test a new chat.
  • If you use a proxy or have traffic filtering on your router or a software firewall, temporarily disable it and try another network.

If the error persists, please send:

  • 2-3 new Request IDs from the failed attempts,
  • your macOS version and a screenshot of the error,
  • logs from Help → Toggle Developer Tools → Console,
  • the result of Network → Run Diagnostics.

Also let me know if disabling HTTP/2 helped.