My cusror agent doesn't respond

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

I send a request or many requests and i get no answer at all. I have this error:
Request ID: 53dfad50-8f70-4be4-b9e1-4b678b8bcfbb
An unexpected error occurred.
[unknown] Network disconnected
RetriableError: [unknown] Network disconnected
at JHk (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12056:27831)
at Nsu (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12056:26566)
at aKy (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12057:11930)
at Object.classify (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12057:16437)
at HHk (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12057:5824)
at async oTh.runWithSharedTurnRunner (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12057:15789)
at async fj.runAgentLoop (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:24528:3041)
at async Hcp.streamFromAgentBackend (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:24547:13853)
at async Hcp.getAgentStreamResponse (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:24547:22878)
at async L4e.submitChatMaybeAbortCurrent (vscode-file://vscode-app/Applications/Cursor.app/Contents/Resources/app/out/vs/workbench/workbench.glass.main.js:12144:2399)

Steps to Reproduce

I just use the IDE Agent on my MAC everything I write and no respond at all

Expected Behavior

I expect it to provide me an answer

Operating System

MacOS

Version Information

Version: 3.9.16
VS Code Extension API: 1.105.1
Commit: 042b3c1a4c53f2c3808067f519fbfc67b72cad80
Date: 2026-06-27T06:41:01.941Z
Layout: editor
Build Type: Stable
Release Track: Default
Electron: 40.10.3
Chromium: 144.0.7559.236
Node.js: 24.15.0
V8: 14.4.258.32-electron.0
xterm.js: 6.1.0-beta.256
OS: Darwin arm64 25.5.0

For AI issues: which model did you use?

Auto

For AI issues: add Request ID with privacy disabled

Request ID: 53dfad50-8f70-4be4-b9e1-4b678b8bcfbb

Does this stop you from using Cursor

Yes - Cursor is unusable

5

Hey, this is a known network transport issue in 3.9.16. On networks with a proxy or VPN, the agent requests don’t reach the server, which leads to Network disconnected. A fix is already out in newer builds.

What to do:

  1. Update Cursor to the latest version. The fix shipped in builds newer than 3.9.16.
  2. If it still happens after updating, go to Settings → Network → HTTP Compatibility Mode and switch to HTTP/1.1, then fully quit and restart Cursor.
  3. Check if you’re on a corporate proxy, VPN, or firewall. This path is sensitive, so try temporarily without VPN.

Let me know if it works after updating.

6

Hey guys, I am facing the same issue today.
Version 3.10.17.

Changed HTTP Compatibility Mode to HTTP/1.1 - no success.

With VPN, without - the same result.
OS - Windows 11.

Thanks!

7

Hey @andyroode, your situation is different from the OP. You’re already on 3.10.17, which includes the fix for that network issue, and HTTP/1.1 didn’t help. This looks like the connection is getting dropped somewhere between your machine and the server, often a flaky VPN or proxy, or a firewall doing HTTPS inspection, not a server-side issue.

To debug, could you share a couple things:

  1. Open Settings → Network → Run Diagnostics and paste the results here.
  2. A fresh Request ID from one of the failed requests in chat: top-right menu > Copy Request ID. Make sure Privacy Mode is off, otherwise the Request ID won’t be available for tracing.
  3. Your network setup: is this a work machine or proxy, and do you have any antivirus or firewall with HTTPS/SSL inspection like Zscaler?

The diagnostics will show whether your requests reach the backend or get cut off on the client. Let me know.

8

Sorry, my bad.
I got the app that blocked the connection.
Investigated myself.

9

Thanks Dean!

It solved it!

Ido