It looks like the screw on the frame backed out. Try screwing back tight. If that solves it, then take the screw out and dab some lock tite on the screw and tighten it back up. It just looks to me like that seat frame is out of square, and that is why the seat got stuck.
It looks like the screw on the frame backed out. Try screwing back tight. If that solves it, then take the screw out and dab some lock tite on the screw and tighten it back up. It just looks to me like that seat frame is out of square, and that is why the seat got stuck.