Cursor critical bug

Support Bug Reports
1

Describe the Bug

Cursor ■■■■ error and bug

Steps to Reproduce

I installed the latest Cursor editor on Windows, and I cannot sign in — clicking the “Sign In” button does nothing. This is unacceptable for a production-level editor.

Log error:
2025-07-26 13:58:46.503 [error] [uncaught exception in main]: Error: Failed to open: The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail. (0x36B1) Failed to open: The application has failed to start because its side-by-side configuration is incorrect. Please see the application event log or use the command-line sxstrace.exe tool for more detail. (0x36B1)

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.2.4 (user setup)
VSCode Version: 1.99.3
Commit: a8e95743c5268be73767c46944a71f4465d05c90
Date: 2025-07-10T17:09:01.383Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Windows_NT x64 10.0.19044

2

HI @Wei_Jun_Lee could you check if there is another version of Cursor installed on your machine?

Please also have a look in following after you click on Sign In as it should open your browser.

  • `Help > Toggle Developer Tools > Open Console Tab & paste errors here,
  • Open Error logs and see there
    image
    image1176×356 38 KB
  • Could the error you show be related to your default browser as Cursor tries to do that.