Behavior Tree Quick Start Guide Error 4.19

At the moment I am stuck with the AI behavior tree because i don’t know what is broken.
So to be honest i was not expecting it to work since the tutorial was made for 4.9 and i expected some things to break along the way but at least I expected some feedback from it. At this point i have no idea what is wrong with my AI.
I used this Documentation as a reference https://docs.unrealengine.com/en-us/Engine/AI/BehaviorTrees/QuickStart
I saw that other people had problems with it too so any help would be amazing.alt text