Connection error (VPN message)

Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Request ID: b5415837-97b1-448f-8d24-a53ea5a45424
ConnectError: [unknown] Network disconnected
at I0c.$streamAiConnect (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7349:397603)
at async vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:587:348474
at async N$n.toolWrappedStream (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4017:24285)
at async vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:5119:7271
at async sL.handleStreamComposer (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:3830:993)
at async GFr.streamResponse (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7948:12308)
at async ZOr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8093:7648)
at async eBr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8095:1998)
at async HOr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8089:567)
at async qOr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8089:27905)
at async zOr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8089:41777)
at async wMe. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4017:39720)
at async QOr. (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:8093:6794)
at async die.processCodeBlocks (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:3872:3486)
at async dN.submitChatMaybeAbortCurrent (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:5119:9338)
at async En (vscode-file://vscode-app/tmp/.mount_CursorN9XlOS/usr/share/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:7200:2761)

Steps to Reproduce

Was chatting and the message appeared on afollowup

Operating System

Linux

Current Cursor Version (Menu → About Cursor → Copy)

Version: 2.0.12
VSCode Version: 1.99.3
Commit: cf556c9696a68b98680ff86651043c97b989fb00
Date: 2025-10-26T03:36:53.227Z
Electron: 34.5.8
Chromium: 132.0.6834.210
Node.js: 20.19.1
V8: 13.2.152.41-electron.0
OS: Linux x64 6.8.0-85-generic

Does this stop you from using Cursor

No - Cursor works, but with this issue

2

Hey, thanks for the report. The “Network disconnected” error on Linux is often caused by DNS or firewall settings blocking connections to Cursor’s backend services.

Please try:

  1. Switch DNS to Google/Cloudflare (this resolved a similar Ubuntu case: Cursor Chat Not Working - Error in Network Diagnositics):

    • System Settings → Network → Edit connection → IPv4/IPv6 → DNS
    • Add 8.8.8.8 or 1.1.1.1
    • Restart Cursor

  2. Test API access from the terminal:
    curl -v https://api2.cursor.sh
    Let me know if it times out or succeeds.

  3. Check firewall/VPN:

    • Are you using a VPN or behind a corporate firewall?
    • Temporarily disable the firewall: sudo ufw disable (for testing only)

  4. Run Network Diagnostics in Cursor:

    • Settings → Network → Run Diagnostics
    • Share the results if the issue persists

Let me know if changing DNS helps.