Hi
What you could try is :
Ive seen something like this before , if all your audio routing is correct then i would try adding a new buss and routing all track to this buss just to test , i can’t remember the exact fix but ive seen it before where the busses have become corrupt after a crash .
EDIT :
Cubase crashed and now my vsts are blocked - Cubase - Steinberg Forums
These issues are related , if your inserts need reactivating due to new memory install then this will be your issue