Are these games which have audio files along side the bin / cue files? If so, for RetroArch, these need to be in a specific file format (I can't remember which one, I believe MP3), for which you can just do a simple conversion for, or the games could be bad rips. If you could try and find another rip, convert the audio files if they have them to the format RetroArch likes, or find a rip that doesn't have the audio files, then that could work.
As a test, I got Nexzr to run, and it was a ccd / img combo. I kind of lied in the tutorial (actually I thought it was true at the time), but I do actually have some ccd games. My version of Nexzr doesn't have any audio files, and it launched just fine, so I am leaning towards a potentially bad rip.