syntax highlighting does not work after update

Bug Reports
1

Describe the Bug

After updating cursor ai to the newest version, I have stopped working syntax highlighting at all, in my favorite files, not html or js. It is also not possible to change the theme via ctr +shift + p and the marketplace doesn’t work.

Steps to Reproduce

Just install the newest version of the cursor

Operating System

Windows 10/11

Current Cursor Version (Menu → About Cursor → Copy)

Version: 1.2.1 (user setup)
VSCode Version: 1.99.3
Commit: 031e7e0ff1e2eda9c1a0f5df67d44053b059c5d0
Date: 2025-07-03T06:16:02.610Z
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 10.0.26100

Does this stop you from using Cursor

Yes - Cursor is unusable

2

I have the exact same issue: syntax highlighting doesn’t work and selecting “Preferences: Color Theme” does nothing.

Version: 1.2.1
VSCode Version: 1.99.3
Commit: 031e7e0ff1e2eda9c1a0f5df67d44053b059c5d0
Date: 2025-07-03T06:06:37.704Z
Electron: 34.5.1
Chromium: 132.0.6834.210
Node.js: 20.19.0
V8: 13.2.152.41-electron.0
OS: Darwin arm64 24.5.0

3

I figured out what caused the issue for me.
I had custom extensions marketplace URLs in my User Settings - “extensions.gallery.itemUrl” and “extensions.gallery.serviceUrl” properties.

When I commented out those settings, everything went back to normal.
So this is a duplicate of this issue, at least in my case:

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