Unable to use Cursor – Network disconnected error

[zhonganeng]

Describe the Bug

When I try to use AI features in Cursor, I receive a connection error and the application becomes unusable.

Steps to Reproduce

Request ID: 43255a64-958d-477c-8270-96fecd1b9649
ConnectError: [unknown] Network disconnected
at BWa.$streamAiConnect (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4846:223657)
at async vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:490:230307
at async ton.toolWrappedStream (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4302:9358)
at async QAt (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:1441:15859)
at async QL.handleStreamComposer (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:1497:993)
at async wsn.streamResponse (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:1441:25694)
at async p5s. (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:5502:7205)
at async r5s. (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:5480:966)
at async a5s. (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:5498:3042)
at async U3e. (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:4323:13006)
at async sse.processCodeBlocks (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:1551:3240)
at async ose.submitChatMaybeAbortCurrent (vscode-file://vscode-app/e:/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:2648:5946)

Expected Behavior

Open Cursor

Try to use any AI feature (e.g., ask a question or code generation)

“Network disconnected” error appears

Cursor becomes unusable

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

版本: 1.3.9 (user setup)
提交: 1.99.3
日期: 54c27320fab08c9f5dd5873f07fca101f7a3e070
Electron: 2025-08-01T20:19:30.453Z
ElectronBuildId: 34.5.1
Chromium: undefined
Node.js: 132.0.6834.210
V8: 20.19.0
OS: 13.2.152.41-electron.0

Does this stop you from using Cursor

Sometimes - I can sometimes use Cursor

[deanrie]

Hey, is your internet connection okay? Are you possibly using a VPN or proxy? Also, run a network diagnostic by opening the settings and going to the network tab.

[zhonganeng]

Hey, my network connection is normal on my end. I’ve also tried using VPN nodes from different regions, but the issue still persists. Sometimes I can connect, but the speed is extremely slow.

[deanrie]

Could you try disabling HTTP/2?

[zhonganeng]

I’ve tried using HTTP/1.0, HTTP/1.1, and HTTP/2 — none of them work. The issue seems unrelated to the HTTP version.