I can no longer add songs to my Music library.
I used to be able to drag mp3s from the Finder into the Music window and they'd be copied into my songs library. Now, I think since updating to macOS 11.6, that doesn't work. When I drag a file, a green plus-sign hovers near my cursor, but a red outline surrounds my song list, and when I release the mouse button, nothing happens. Also, when I click on an mp3 in the Finder and select "Open with Music," Music comes to the front but otherwise nothing happens.
MacBook Pro