Cursor IDE Often shows connection failed error

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Often shows connection error.

Steps to Reproduce

Even tried clearing the cache, temp files, restarting the IDE, restarting the PC. still same.

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.69 (system setup)
VSCode Version: 1.99.3
Commit: 63fcac100bd5d5749f2a98aa47d65f6eca61db30
Date: 2025-11-07T18:21:29.650Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Windows_NT x64 10.0.26200

For AI issues: which model did you use?

Auto

Does this stop you from using Cursor

Yes - Cursor is unusable

2

Hey, thanks for the report. This is a known connection issue that already has several proven fixes.

Please try the following steps:

Disable HTTP/2 (most common fix):

  • Open App Settings Ctrl+,
  • Search for “HTTP/2”
  • Enable “Disable HTTP/2”
  • Restart Cursor

This helps users on networks with partial HTTP/2 support.

Check MCP servers (if configured):

  • Cursor has a limit of 80 tools
  • Disable MCP servers you’re not actively using in Cursor Settings
  • Several users have confirmed this fixed their intermittent connection errors

Try starting a new chat:

  • Sometimes creating a fresh chat resolves temporary connection issues

Check Windows Firewall:

  • The updated app may need to be re-approved for internet access

Most users report that disabling HTTP/2 fixes the issue right away. If the problem is still there after these steps, please share your Request ID from the error message and the results from Cursor Settings → Network → Run Diagnostics.