← All errors · CursorCursor editor & agent errors
Cursor: Connection failed. Check your internet connection or VPN
Exact error
Connection failed. If the problem persists, please check your internet connection or VPN
What it means
Cursor's client could not reach its AI backend for a chat/agent request.
Likely causes
- Network drop, corporate proxy or VPN blocking or inspecting traffic.
- A temporary Cursor service incident.
- HTTP/2 being blocked by a proxy.
How to fix it
Check the Cursor status page for incidents.
Try without the VPN/proxy, or on another network.
If you are behind a corporate proxy, try Cursor's setting to disable HTTP/2 (search "HTTP/2" in Cursor Settings) and restart.
Prevent this next time
- Commit before letting the agent make large changes so you can always roll back.
- Put recurring instructions in project rules instead of repeating them in chat.
FAQ
What does "Cursor: Connection failed. Check your internet connection or VPN" mean?
Cursor's client could not reach its AI backend for a chat/agent request.
What usually causes it?
Network drop, corporate proxy or VPN blocking or inspecting traffic. A temporary Cursor service incident. HTTP/2 being blocked by a proxy.
How do I fix it?
1. Check the Cursor status page for incidents. 2. Try without the VPN/proxy, or on another network. 3. If you are behind a corporate proxy, try Cursor's setting to disable HTTP/2 (search "HTTP/2" in Cursor Settings) and restart.
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