Never mind... got the other half the story here:
Would be helpful if all the pertinent information was in one place related to this error instead of having to figure it out from two different sources, lol.
Basically in cases where things are M1 compatible through the entire pipeline (KK, Arturia, U-He, etc.) then the culprit is the third-party needs to get their NKS files up-to-date to work with the newest versions of KK.
So what does this mean for Maschine users who load groups and the Massive on pad 16 is now missing? Are NI going to re-release all groups with the VST3 version of massive loaded on all PAD 16 of every single group? I really hope so because I currently am not hearing the Maschine groups loading fully.