www.makemkv.com

"This Blu-ray needs a library for AACS decoding, and your system does not have it."

every time what is this?

Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom3' at offset '32939636736'
Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom3' at offset '32939636736'
Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom3' at offset '32939636736'
Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom3' at offset '32939636736'
Error 'OS error - The volume for a file has been externally altered such that the opened file is no longer valid' occurred while reading '\Device\CdRom3' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
Error 'OS error - This device does not exist' occurred while reading '/BDMV/STREAM/00030.m2ts' at offset '32939636736'
what is this mess?

You have 2 issues it looks like 1 your drive has a power issue plug directly to the motherboard in the back or get a high powered USB hub 35+ watts
2 you don't have makemkv integration enable for vlc