Keep getting connection error messages in chat

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I’ve been experiencing frequent and frustrating connection errors when using Cursor’s AI features. Specifically:

  • The errors occur consistently when using Claude or gpt 5 models or any models.
  • Most commonly happens during git operations (commits, pushes, etc.)
  • Connection drops and says try again.
  • Requires multiple retries to complete simple operations

This issue has significantly impacted my workflow and productivity.

Steps to Reproduce

Steps to reproduce:

  1. Open a project in Cursor
  2. Attempt any operation with AI assistance
  3. Connection fails mid-operation

Screenshots / Screen Recordings

Screenshot 2025-10-30 210808.png
Screenshot 2025-10-30 210808.png914×379 20.5 KB

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.40 (system setup)
VSCode Version: 1.99.3
Commit: a9b73428ca6aeb2d24623da2841a271543735560
Date: 2025-10-30T04:12:35.564Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.26100

For AI issues: which model did you use?

gpt5 claude sonnet

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

2

Hey, thanks for the report. This looks like a known intermittent connection issue on Windows. The most common fix is to disable HTTP/2:

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

If that doesn’t help, also try:

  • Check MCP servers (if configured): Cursor has a limit of 80 tools. Disable any MCP servers you’re not using
  • Run network diagnostics: Cursor Settings → Network → Run Diagnostics
  • Check firewall/antivirus: Windows may need to re‑allow internet access for the updated app version
  • Switch DNS to Google/Cloudflare: Settings → Network & Internet → Ethernet (or Wi‑Fi) → select your connection → Edit (DNS) → Manual → IPv4 ON →
    Preferred DNS: 8.8.8.8 or 1.1.1.1
    Alternate DNS: 8.8.4.4 or 1.0.0.1
    Save

Let me know if disabling HTTP/2 fixes it. If the issue persists, please share any error messages so we can investigate further.

3

Request ID: aba795c6-0012-4cdc-9143-d6c54cec6198

issue is persistent/intermittent, Disabled http/2 restarted updated cursor multiple times, i feel like wasting lot of time waiting to run.

4

Thanks for the update. Since disabling HTTP/2 didn’t help, let’s check a couple more things:

  1. MCP servers (this has fixed the same issue before):
  • Cursor has a limit of 80 tools
  • Check if you have MCP servers configured: Cursor Settings → search “MCP”
  • If yes, temporarily disable all MCP servers and see if the connection errors go away
  1. Network diagnostics:
  • Run: Cursor Settings → Network → Run Diagnostics
  • Share the results here
  1. Also check:
  • Firewall/antivirus: you may need to re-allow Cursor after updates
  • VPN: try without VPN if it’s enabled

Share the results and I can escalate this with your Request ID if needed.