Description

I expect: Block list opens
Actual: Block list does not open

Step-by-step reproduction instructions

1. Enable Theme TT1
2. Open Appearance > Widgets
3. Click the plus button in any widget area
4. Click [Browse all]

Screenshots, screen recording, code snippet

Environment info

WordPress: 6.7.1
Plugin: nothing
Theme: TT1

Please confirm that you have searched existing issues in the repo.

• Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

• Yes

Please confirm which theme type you used for testing.

• Block
• Classic
• Hybrid (e.g. classic with theme.json)
• Not sure