I have been using the trial version of macOS dbPowerAmp / CD Ripper for a while now, successfully ripping a load of CDs via an external drive. Today I keep getting "No disc inserted", despite this not being the case. The iMac can see / read / play the music fine. I have checked the settings within Settings / Security / Full Disk Access and / Files & Folders as suggested on another thread, but that hasn't worked.

In case it was something to do with the trial version I have just paid for the Full version (3 days early), but with no success.

What else should I be doing?