"Connection failed"

[deanrie]

Hey, thanks for the report.

This is a known issue with a few possible causes. Let’s check:

1. Disable HTTP/2:

   • CTRL+, → search for “HTTP/2” → enable “Disable HTTP/2” → restart Cursor

2. Collect diagnostics:

   • Cursor Settings → Network → Run Diagnostics, and share a screenshot of the results
   • Help → Toggle Developer Tools → Console, reproduce the issue and share a screenshot of the red errors (especially lines with “ConnectError” or “Serialization error”)

3. Check extensions:

   • Run cursor --disable-extensions in a terminal and see if that helps
   • If it helps, disable extensions one by one: Settings → Extensions

4. Extra info:

   • What’s your region or country?
   • Are you using a VPN or proxy?
   • Which extensions do you have installed?

Similar cases:

• Connection Error on 2025-12-27 1:38 PM
• Repeatedly says connection issue when my connection is fine

Try these steps and let me know what you find.