https://www.bleepingcomputer.com/news/microsoft/microsoft-issues-emergency-fix-for-broken-windows-11-start-menu/

Microsoft has addressed a known issue that was causing the start menu on some Windows 11 to malfunction after installing recent updates.

This known issue affects only devices running Windows 11, version 21H2, and it was acknowledged on Friday after Redmond received customer reports of start menu issues affecting some systems.