Event dispatcher bind target invalid?

Hi, I’m trying to set up a event dispatcher. The idea is for the player to be able to press a button in a UMG, which will call this event dispatcher. The event dispatcher will then change character, by possessing another pawn in the level. “Evidence” is the UMG blueprint. “ParlourChar” is the pawn I’m trying to possess. I’m not sure what’s going wrong with the bind’s target, but if anyone is able to tell me why this isn’t working, that would be most helpful.