Some files were not found during startup for a new installation

Support Bug Reports
1

Where does the bug appear (feature/product)?

Cursor IDE

Describe the Bug

files are not found

image
image731×410 31.2 KB

Steps to Reproduce

install fresh version,
run cursor

Expected Behavior

nothing should be missed

Operating System

MacOS

Version Information

v3.9.8 xxxx

Does this stop you from using Cursor

No - Cursor works, but with this issue

5

Hey, thanks for the report. These notifications aren’t coming from Cursor, they’re coming from a third-party extension called Custom UI Style. You can tell from the Source: Custom UI Style label on both toasts.

How it works: the extension patches Cursor’s internal JS files to apply a custom theme. In your case it targets sessions.desktop.main.js. After every Cursor update or fresh install, those files get renamed or moved, so the extension can’t find the patch target and shows file not found. This doesn’t affect Cursor itself, it keeps working, as you confirmed.

To remove the warnings:

  • Disable or uninstall the Custom UI Style extension, or
  • After each Cursor update, re-apply the patch using the extension command Reload or Apply.

Extensions that modify install files will often break after updates and are used at your own risk. So this isn’t a Cursor bug. I’m closing the thread, but if you still have questions, feel free to reply.