AI and behavior tree causing Unreal Engine to crash

Hello, I have a problem with my A.I. Controller causing my game to crash. I originally created multiple A.I’s for my characters but that didn’t work so eventually I found out that linking all of my enemies to the same A.I. gave them all similar behaviors but now there seems to be some kind of error that pops up whenever I try to run my game.

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Is it possible that because all of my enemies don’t have the complete suite of abilities that the one enemy I have set has , that the game is crashing due to incomplete functionality or am I doing the A.I. setup incorrectly?

Switching from 7.3 to 7.5 fixed it after I rebuilt the Behavior Tree from scratch.