Hi!
I´ve encountered this weird problem recently, that my behaviortree just won´t start. I have setup my AIcharacter, possessed it with my AIController and inside the possess function I´ve run the behaviortree. Even when I debug whether my AICharacter has BehaviorTree assigned and whether it´s running, it shows exactly that.
This is how my unfinished behaviortree looks like.
This is how I run the behaviortree in code. Character->BehaviorTreeAsset is of type BehaviorTree and setup via editor.
I hope there´s enough information to make deductions based on this. Also there are lots of threads that are associated with the same problem so I post them all here (they might find their answer if I get my answer).