The entities who built the tree house aren't very fond of cameras, and that is what caused the event. The ariral slapper event is probably bugged it should cause an ariral to spawn near you and chase you, sometimes entering into your base, then they will beat you up. Maybe try exploring around the base and such to see if you can get the ariral unstuck if it is stuck somewhere. although im pretty sure they just spawn in so it being stuck is pretty unlikely.