All of a sudden, I can't load music that I've downloaded into my Music app on my Mac

Iowafilmman,

There are many ways to add an audio file to your iTunes/Music library. It is not uncommon for one or more of them to be broken. Once you are sure the valid file is on your local drive, try one or more of the following:

• Drag it into iTunes (or Music)
• Drag it into a specific playlist (i.e., the open window of a regular playlist, not a smart playlist)
• Drag it into the "Automatically Add..." folder
• Use the command File > Import and navigate to its location
• Right-click the MP3 and choose Open With > iTunes (or Music)
• Double-click the MP3

If the audio file is valid, at least one of these should work.

If none of them work you may have an invalid or corrupt file.