www.makemkv.com

I got this message whenever I run MakeMKV. What is it mean?

>MakeMKV v1.8.11 win(x64-release) started
>Error 'Scsi error - ILLEGAL REQUEST:INVALID COMMAND OPERATION CODE' occurred while issuing SCSI command 46020..00140 to device 'SPTI:\Device\CdRom2'

It means your drive did not like the instructions MakeMKV sent it.

Fixing it may be as simple as restarting your computer, but the issue seems to be that Windows isn't talking to the drive right now.