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Log indicates disk is mastered with invalid directory links...

MakeMKV v1.9.5 darwin(x86-release) started
Optical drive "DVD-RW PIONEER DVD-RW DVR-104 A227" opened in DASPI v1.5 mode.
Optical drive "BD-RE HL-DT-ST BD-RE BE12LU38 1.00" opened in DASPI v1.5 mode.
Error 'Scsi error - ILLEGAL REQUEST:ILLEGAL MODE FOR THIS TRACK' occurred while reading 'BD-RE HL-DT-ST BD-RE BE12LU38 1.00' at offset '25024069632'
Error 'Scsi error - ILLEGAL REQUEST:ILLEGAL MODE FOR THIS TRACK' occurred while reading 'BD-RE HL-DT-ST BD-RE BE12LU38 1.00' at offset '25024069632'
Using direct disc access mode
Error 'Scsi error - ILLEGAL REQUEST:ILLEGAL MODE FOR THIS TRACK' occurred while reading 'BD-RE HL-DT-ST BD-RE BE12LU38 1.00' at offset '25024069632'
Error 'Scsi error - ILLEGAL REQUEST:ILLEGAL MODE FOR THIS TRACK' occurred while reading 'BD-RE HL-DT-ST BD-RE BE12LU38 1.00' at offset '25024069632'
Loaded content hash table, will verify integrity of M2TS files.
Automatic SVQ downloading is disabled or failed.
Processing BD+ code, please be patient - this may take up to few minutes
Processing BD+ code using generic SVQ from builtin/00000.svq
BD+ code processed, got 1 FUT(s) for 5 clip(s)
Title #00011.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00008.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00012.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00031.mpls has length of 55 seconds which is less than minimum title length of 120 seconds and was therefore skipped
File 00002.mpls was added as title #0
File 00001.mpls was added as title #1
Title #00006.mpls has length of 72 seconds which is less than minimum title length of 120 seconds and was therefore skipped
File 00005.mpls was added as title #2
Title #00009.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00010.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00013.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00014.mpls has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
File 00003.mpls was added as title #3
File 00004.mpls was added as title #4
Title #00007.m2ts has length of 40 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00013.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
File 00009.m2ts was added as title #5
Title #00010.m2ts has length of 8 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00017.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00014.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00018.m2ts has length of 27 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00005.m2ts has length of 1 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00012.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00011.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00008.m2ts has length of 32 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00016.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Title #00015.m2ts has length of 7 seconds which is less than minimum title length of 120 seconds and was therefore skipped
Operation successfully completed
Saving 6 titles into directory /Volumes/Raid Set 1/Downloads/Firefly Disk 2
Error 'Posix error - Input/output error' occurred while reading '/dev/rdisk18' at offset '25024069632'

Error 'Posix error - Input/output error' occurred while reading '/dev/rdisk18' at offset '25024069632'

This says that the drive is having issues reading part of the disk. Have you wiped it clean?

I have the same issue, Firefly Disc 2 (UK). Exact same offset as dgodfrey. I guess a bad pressing?

Any time two users on two different operating systems come up with the same location for a read error, it is much more likely to be a bad pressing.

Yeah, I figured. I will see if Fox can send me a replacement.
Thanks

I tried it again a few hours later (ripped some other discs in the meantime) and it worked this time.
Strange, maybe my Bluray drive handles bad discs better when it is hot or something.
But anyway, all good. Thanks again.