Sometimes the error appears after successful HK download, but before disc insertion. This is a cosmetic bug in some MakeMKV versions. Test by inserting a known new Blu-ray; if it rips successfully, ignore the message.
Test manually:
MakeMKV stores downloaded HK data locally. If it’s corrupted, delete it: makemkv automatic hk downloading is disabled or failed upd
Delete these files, then restart MakeMKV. It will re-download fresh HK data. Sometimes the error appears after successful HK download,
Incorrect system time breaks HTTPS handshakes: Test manually: