Can't use Docs, getting connection error

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Ever since the update 2.2.27 and above, I can no longer use docs, everytime I mention them in the prompt, and send the prompt, it gives me connection error and if I removed the docs, it works fine, I’m using Mullvad VPN, and without VPN, I can’t use AI at all since its my end issue

Request ID: b66db63f-a793-43e0-983e-3db4c2991339
ConnectError: [internal] internal error
at szc.$endAiConnectTransportReportError (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:12375:456006)
at xBo._doInvokeHandler (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:13027:22831)
at xBo._invokeHandler (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:13027:22573)
at xBo._receiveRequest (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:13027:21335)
at xBo._receiveOneMessage (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:13027:20152)
at zLt.value (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:13027:18244)
at Ee._deliver (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:49:2962)
at Ee.fire (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:49:3283)
at Tvt.fire (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:12360:12156)
at MessagePort. (vscode-file://vscode-app/tmp/.mount_CursorqhYze7/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:15027:18433)

Steps to Reproduce

Mention any doc, multiple docs, in the prompt, then submit while having Mullvad VPN on

Expected Behavior

Submitting without connection error

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.2.43
VSCode Version: 1.105.1
Commit: 32cfbe848b35d9eb320980195985450f244b3030
Date: 2025-12-19T06:06:44.644Z
Electron: 37.7.0
Chromium: 138.0.7204.251
Node.js: 22.20.0
V8: 13.8.258.32-electron.0
OS: Linux x64 6.18.1-1-default

For AI issues: which model did you use?

All of them

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hey, thanks for the report.

This looks like an HTTP/2 or serialization issue when using @docs over a VPN. Could you try these steps?

  1. Disable HTTP/2: Settings Ctrl+, > search for “HTTP/2” > enable “Disable HTTP/2” > restart Cursor
  2. Check MCP servers: Settings > Cursor > MCP. If you have any configured, disable them
  3. Run Network Diagnostics: Settings > Network > Run Diagnostics, then share a screenshot
  4. Test without extensions: run cursor --disable-extensions in a terminal

Also, does anything work without @docs, like normal chat without referencing docs?

Let me know what you find.

3

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Part 2

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You welcome! Here are the screenshots of the network diagnostics, I perhaps tried everything and no use, still giving me errors whenever I use @docs

Otherwise, everything works fine like a normal chat without referencing docs, it only errors when I reference the docs

4

Hey @NightStars

Can you try again? This should be fixed now :crossed_fingers:

5

Thank you a lot! It seems some docs started to work! For example, Next.js docs alone work or “Next.js, Cloudflare, TypeScript, Framer Motion“ together also work

Though, when I use the docs TailwindCSS, I get the error again

I think TailwindCSS docs are having connection errors or something like it, maybe some other docs I don’t use or not aware of are also having issues like TailwindCSS

6

Please grab another Request ID like this one if you get the error again! :pray:

7

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