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Episode 23 out of 24 on 11 DVD of a Danish TV-show - first time I get this error...

MakeMKV v1.6.15 win(x64-release) started
Debug logging enabled, log will be saved as C:\Users\Michael/MakeMKV_log.txt
Using direct disc access mode
Title #0 was added (13 cell(s), 0:55:00)
Title #1 was added (14 cell(s), 0:59:13)
Title #2 was added (5 cell(s), 0:31:17)
Title #3 was added (2 cell(s), 0:06:26)
Title #4 has length of 13 seconds which is less than minimum title length of 60 seconds and was therefore skipped
DEBUG: Code 233 at +Q3FIfSS7JrfN3YSEF2g5A2f:0
Operation successfully completed
Saving 1 titles into directory J:/MKV
DEBUG: Code 38 at bCs<Y/4t@TU?,NDiE<x:121266626
DEBUG: Code 149 at bCs<Y/4t@TU?,NDiE<x:121266925
DEBUG: Code 6 at bCs<Y/4t@TU?,NDiE<x:29398737
DEBUG: Code 0 at aunO=lJAWqIjw[[SDBEZO:213134377
LIBMKV_TRACE: Exception: Error while reading input
Failed to save title 0 to file J:/MKV/title00.mkv
0 titles saved, 1 failed

Reading directly from the disk, Handbreak could create a mp4 file without problems reading the disk...

It's a disc mastering error - handbrake ignores these (making shutter or slight AV de-sync), MakeMKV tries to fix but occasionally fails. This one will be fixed in a next version.