www.makemkv.com

Ah, ok. I'll try that. What's weird is that it decrypted the other 2 UHD's in the set. It's the new box set that came out recently with all 3 movies.

MKB20_v76_BILL_TEDS_EXCELLENT_ADVENTURE_7087.tgz 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? FWIW could you also upload the AACS/MKB_RO.inf file from your physical UHD disk...

Yes, I downloaded the latest before submitting the dump. Even with the latest keysdb, it couldn't decrypt the disc

Submitted today.

MKB20_v76_BILL_TEDS_EXCELLENT_ADVENTURE_7087.tgz