I don't know exactly when this started happening, but recently my Playlists tab has been replaced with a blank screen. I've deleted and remade the tab but it stays the same. I can right click on the left part of the screen where my playlists would be listed, and it gives me options such as "play shuffled" as if playlists were being shown there, but nothing happens when I click them, and the screen itself remains black. All other tabs are working normally, it's just my playlists tab that's suddenly stopped functioning. Updating to the new version of MB has not fixed this.