Just in case anyone needed more details, I just had this happen because Christmas tree pine needles had fallen into the plastic enclosure that houses the lidar sensor and they were blocking it from moving freely.
I ultimately had to open it up by popping off the top/back plate with a plastic pry tool (no screws here), unscrewing the plastic fasteners that hold the lid (3 screws each) and then removing the lidar cover (4 screws). Turns out the little rubber belt that makes it spin had come off completely, so I cleaned it out with compressed air and reattached the belt to the pulley and it works great again now.
