My library recently changed... I have no more Songs list; my Artists list has only one artist; and my albums list has four albums. I've tried nuking data, uninstalling/reinstalling, and have gone through all my settings. I'm definitely online, and all my playlists do show up, and the songs within them play.
On the home screen, it lists artists I've recently listened to. I tapped one, and it said there were no playable songs by that artist. This is incorrect, as I have many of that artist's songs! It suggested turning on "show unplayable songs" in Settings. I did that, but it didn't change anything. This has gone on for a while. Help?