"Open Level" Node Crashes Engine

Man, I’m just running into weird problems all the time right now.

I don’t even know where to begin trying to figure this one out, but I can’t use the “Open Level” node without crashing the engine. All I know is that it seems to involve my customized character in some way, since when I switched to the ASP Character the node calls fine. My character has been changed pretty extensively. Off the top of your head, where do you suggest I start to fix something like this?