www.makemkv.com

Hello,

I'm unable to open the new French 4K UHD release of "The Descent" from Pathé.

Disc information:
- Title: The Descent
- Country: France
- Publisher: Pathé
- Release date: July 1, 2026

Drive:
- LG BU40N
- LibreDrive enabled
- Firmware 1.03

Software:
- MakeMKV 1.18.4
- macOS Apple Silicon

Error:
The volume key is unknown for this disc - video can't be decrypted.
Failed to open disc.

Dump file:
MKB20_v82_THE_DESCENT_3D4C.tgz

I can upload the dump file if needed.

Thank you.

Did you attach the dump file to an email and send it to svq@makemkv.com?

UHD FAQ

Also, you could try other key mechanism MakeMKV supports, the Public KeyDB.