www.makemkv.com

Backing up disc into folder "/Users/~/Movies/backup/SHINE A LIGHT"
Loaded content hash table, will verify integrity of M2TS files.
Error 'Scsi error - HARDWARE ERROR:TRACK FOLLOWING ERROR' occurred while reading '/BDMV/STREAM/00001.m2ts' at offset '20415971328'
DEBUG: Code 0 at K7J&at 'F4hukf~W9*2:213134469
DEBUG: Code 0 at |~Q[v6|qjZA,u=Rlpi_":121265108
Backup failed

Your drive cannot read the disk. Easy possibilities are a dirty disk (clean the disk), scratched disk (depends on how badly scratched, waxing sometimes works), poorly pressed disk (replacement is the only option, hopefully from a different production batch).

Less easy possibilities is a defect in the drive itself, such as dirt preventing the optics from following the data track.