I can’t remove the world from my favorite list. Probably this world not exist anymore.

When I try to click on "Unfavorite" button nothing happend. It was "aurora mountain v.7.1" if I remember right. Also other buttons like "New Instance", "Go", "Make Home", "Back" doesn't work too, but general buttons like "Worlds", "Avatar", etc... works fine. In world list this world have "???" name.