Cursor fails to connect or do anything

Support Bug Reports
5

Hey, thanks for the report. From the screenshot, I see ConnectError [invalid_argument], network errors, and OTLP 400.

Let’s check the network:

  1. Cursor Settings > Network > Run Diagnostics - share a screenshot of the results
  2. Cursor Settings > search “HTTP/2” > enable “Disable HTTP/2”, full Cursor restart
  3. VPN/proxy/Zscaler - disable temporarily and try again

Also try:

  • Settings > Agents > Inline Editing & Terminal > enable “Legacy Terminal Tool”, then Cmd+Shift+P > “Terminal: Kill All Terminals”, restart
  • Check git in a regular terminal (outside Cursor) - do the same commands work?
  • If MCP servers are configured in ~/.cursor/mcp.json - disable them all temporarily

Could you please share:

  • Screenshot of Network Diagnostics
  • View > Output > select “Git” - last lines with errors
  • New Request ID after trying with HTTP/2 disabled

Similar issue: SLOW or NO response from the agent - resolved via extensions

If timeouts/freezes persist after these steps, I’ll pass it to the engineers.