"Users recently noticed that third-party apps for customizing the user interface no longer work in the upcoming Windows 11 version 24H2. Not only does Microsoft not allow you to run those apps, but it even blocks you from upgrading to newer builds. StartAllBack, a popular tool for tweaking the taskbar and Start menu in Windows 11, was among the first to fail on 24H2. Sadly, it is not the only one. ExplorerPatcher also no longer works in Windows 11 24H2."
"Windows 11 version 24H2 may cause some headaches for those relying on third-party apps for user interface customization. The latest builds ship with the flag that prevents restoring the old taskbar from the Windows 10 era enabled by default. This could be a sign of Microsoft wanting to remove old components from Windows 11 as it moves forward."
Neowin 4/5/2024
https://www.neowin.net/news/microsoft-blocks-even-more-customization-apps-in-windows-11-version-24h2/
The writing was on the wall for this one!