Constant connection error

[Kyrylo_Petrov]

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Connection error, constant error with every model “Connection failed. If the problem persists, please check your internet connection or VPN”
Started yesterday during the Cloudflare incident, but stil persists.

Steps to Reproduce

ask in agent chat window

Operating System

MacOS

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.1.46
VSCode Version: 1.105.1
Commit: ab326d0767c02fb9847b342c43ea58275c4b1680
Date: 2025-12-02T03:59:29.283Z (4 days ago)
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Darwin arm64 24.6.0

Does this stop you from using Cursor

Yes - Cursor is unusable

[Kyrylo_Petrov]

solved by disabling HTTP/2 compatibility

Connection failed. If the problem persists, please check your internet connection or VPN

[图片] I had the same problem as you until I checked “Disable Http2” and it was solved

[jokerfool (Jason)]

Its also a bug from many previous versions, if you install 1.4 for example, youll probably see the bug once or twice, wont have to disable anything and cursor works fine.

[deanrie]

Hey, thanks for the report. Disabling HTTP/2 is a valid workaround for this network issue. Steps: App Settings → search for “HTTP/2” → enable “Disable HTTP/2”. Discussion and solution: Connection failed. If the problem persists, please check your internet connection or VPN

If the error persists even after disabling HTTP/2:

• Settings → Network → Run Diagnostics and share the result
• Request ID of the failed request from the chat menu → Copy Request ID
• Cursor version (Help → About), OS, exact reproduction steps, a screenshot of the error, and any errors from DevTools Console

We don’t recommend rolling back to 1.4. If this resolves it for you, let us know and we’ll mark the thread as solved.