Internal cursor error on npm build

Support Bug Reports
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1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

Receiving “internal error” An unexpected error occurred on our servers. Please try again, or contact support if the issue persists. When prompting to do an npm install.

Request ID: 912a5198-3c32-4154-b51b-472546c5aa7e
[internal] serialize binary: invalid int 32: 4294963248
LTe: [internal] serialize binary: invalid int 32: 4294963248
at kmf (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9095:38337)
at Cmf (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9095:37240)
at $mf (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9096:4395)
at ova.run (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9096:8170)
at async qyt.runAgentLoop (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34190:57047)
at async Wpc.streamFromAgentBackend (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34239:7695)
at async Wpc.getAgentStreamResponse (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:34239:8436)
at async FTe.submitChatMaybeAbortCurrent (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:9170:14575)
at async Oi (vscode-file://vscode-app/c:/Users/xx/AppData/Local/Programs/cursor/resources/app/out/vs/workbench/workbench.desktop.main.js:32991:3808)

Steps to Reproduce

prompt to npm install

Expected Behavior

install works

Screenshots / Screen Recordings

Screenshot 2026-01-22 174543.png
Screenshot 2026-01-22 174543.png240×167 3.04 KB

Operating System

Windows 10/11

Version Information

Version: 2.4.21 (user setup)
VSCode Version: 1.105.1
Commit: dc8361355d709f306d5159635a677a571b277bc0
Date: 2026-01-22T16:57:59.675Z
Build Type: Stable
Release Track: Default
Electron: 39.2.7
Chromium: 142.0.7444.235
Node.js: 22.21.1
V8: 14.2.231.21-electron.0
OS: Windows_NT x64 10.0.26200

Additional Information

This was working until I installed the latest cursor update

Does this stop you from using Cursor

No - Cursor works, but with this issue

3

Hey, thanks for the report.

This is a known bug with int32 serialization when running terminal commands via the agent on Windows. It happens when the terminal returns large exit codes that don’t fit in a signed int32.

The team is aware of the issue. Unfortunately, there’s no workaround yet.

Let me know if this is blocking you in a critical way, and the team may raise the priority.

4

It is not blocking. I am able to work around it. thanks

1 Like
5

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