-C_J_W- Said:
"Why Cant I import my mp3 to Apple Music???:
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Q1. "How do I know if I’m in safe mode?"
A1. When in Safe Mode, you see the words "Safe Mode" on the top-left and top-right corners of the screen.
Q2. "Once I’m in safe mode what do I do?"
A2. Try importing and playing the files.
Q3. "now when I try to play one of the files with QuickTime player it gives me an error of -101."
A3. Then there is an error with the software. So, to fix that, Reinstall the macOS:
Go Here: How to reinstall macOS from macOS Recovery - Apple Support. Important: Be certain to create a backup of your Mac prior to all of this. That way, you can have something to restore from the Mac from, should anything go wrong with the reinstall. Once reinstalled, try this once more.