If you click “Review Incompatible Drivers”, which drivers does it list?
My machine, which has been running Windows 11 since I build it, had Core Isolation enabled by default. I had to disable it to install the RW-Everything driver (for obvious reasons; it is unkind to raw hardware ).
Missed that one, I see now my backup software is somehow interfering. I’ll try approaching their support. Needed another set of eyes on this one, thanks @DHowett !