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I can't rip the BluRay (German) of the movie '7500':

MakeMKV v1.15.1 win(x64-release) started
Using direct disc access mode
LibreDrive firmware support is not yet available for this drive (id=0CA01AE87E36)
Loaded content hash table, will verify integrity of M2TS files.
This disc uses newer version of AACS protection. Please let us know about it by visiting http://www.makemkv.com/a/?4dypdZiteCamPR...
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0CA85E7994739EDC2069CECC481D711EB8D to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..036CA4A4F5E4D82068A3910CBE1E311298F to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0B25806D2FEE12F61C85B6CFCFF0DED4376 to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0E836E5EC5DE3A1D1198E2CE3545B3384B9 to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0F096C215055F63EB1E04CCCC8ADEA926BD to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0FFAE6D7338A5EA6BB9E3EEB6781F0074BD to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0E7F62F3E876AFA85E94329E4801A52E04B to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..0038555F68D5B30BCCA7A92196861BC3F9D to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..079713E00B391148D917C1FB2FD46CE68DC to device 'SPTI:\Device\CdRom1'
Error 'Scsi error - ILLEGAL REQUEST:COPY PROTECTION KEY EXCHANGE FAILURE - AUTHENTICATION FAILURE' occurred while issuing SCSI command A30..00200740100720..035BD5E97E1184495E0324F0EF0B812D2CD to device 'SPTI:\Device\CdRom1'
Saved AACS dump file as C:\Users\Sven/.MakeMKV/MKB_v76_7500_-_Siebentausendfünfhundert_DD66.tgz
The volume key is unknown for this disc - video can't be decrypted
Failed to open Disc


Can anybody help?

It appears that the support for v76 of AACS is not universal. Some disks with v76 are fine, others do not decode.

Reporting the issue by sending the file generated to svq@makemkv.com will help.