www.makemkv.com

I figured it out in my case: I'd used a snap install via:

https://connectwww.com/how-to-install-m ... ter/61127/

After uninstalling, and reinstalling via unofficial PPA above, all is now well(-ish).

I forgot to mention this is an slimline SATA drive connected internally.

Anybody have any ideas?

I have the same issue with a different model drive ("Failed to get full access to drive "HL-DT-ST BD-RE BU40N". Make sure that you either have write access to device "/dev/sr0", are member of "cdrom" group or have CAP_SYS_RAWIO enabled."). Note that 'groups' r...