The volume key is unknown for this disc - video can't be decrypted
Failed to open disc
The Creator 4K Failed to open disc
Re: The Creator 4K Failed to open disc
Have you tried downloading the latest KEYDB.cfg file, copying it into MakeMKV's data directory (i.e. where MakeMKV also writes its TGZ dump files) and restarting MakeMKV?
Failing that, could you also provide your TGZ dump file here please, either as an attachment or via a download link? This would allow The Powers That KEYDB to try to help you too.