Okay, so I have had this bug twice. I have no idea what's causing it, but after I've had my physics movement engine in for a little while, it starts to mess up in the way that it won't let me place a new condition. It just shows a tab with nothing inside.. Completely blank. I'm not really sure what to do but keep removing the physics engine and restore it, but then I have to redo all of my conditions and everything.. It's kind of annoying. Thanks, any help is appreciated!