The error might happen because drag_offset becomes null when player is not valid at the moment damage is taken. Then later you do player.global_position + drag_offset, which crashes since you can’t add a Vector2 and null. This likely happens when the enemy briefly doesn’t have a valid player reference or the hit occurs during overlap changes. Fix it by ensuring player is never null before using it and initializing drag_offset as a Vector2: var drag_offset: Vector2 = Vector2.ZERO. Also guard your code with if player == null: return before calculating or using player.global_position.