I was using MakeMKV just fine, then I put in a dvd and got the following.
Drive BD-RE MATSHITA BD-MLT UJ240AF 1.01 HL06 223964 has RPC protection that can not be bypassed. Change drive region or update drive firmware from http://tdb.rpc1.org. Errors likely to follow.
Error 'Scsi error - ILLEGAL REQUEST:MEDIA REGION CODE IS MISMATCHED TO LOGICAL UNIT REGION' occurred while reading '/VIDEO_TS/VTS_01_1.VOB' at offset '2048'
There were more lines of the same. Not sure how to fix this, I am on Bazzite.