This is a false and misleading claim that can cause users to needlessly replace discs or drives only to find that the error still occurs within MakeMKV.The ONLY reason for this error is inability of the drive to read the data from the disc. This is caused by a damaged disc, failing drive, or both. The error comes from the drive before MakeMKV has an opportunity to look at the data. Nothing else can cause this error - no protection, no software issue - only physical disc or drive damage.
While physical damage is a obvious cause, these errors more commonly occur due to data mastering errors on otherwise undamaged media. Sometimes those errors repeat across discs and sometimes they don't. Sometimes they occur in the same spot and sometimes they don't. But in almost all cases short of visible, physical damage, these discs will play just fine. They just won't rip.
Most playback software is able to handle these errors, while MakeMKV is not. MakeMKV could handle these errors by interpolating the data or skipping the data across the tiny sections of media that have such data errors. And that omission is MakeMKV's fault — not the user's fault or the disc's fault or the device's fault.
So before MakeMKV exits Beta and can command a $50 price tag, I would encourage its maker(s) to stop treating data errors as fatal and come up with a graceful solution for dealing with imperfect data.