Engine version: 5.4
Detailed description of the issue: Behavior trees quickstart guide is missing a step. from what I can tell, the section where you update the patrol location is incomplete. after setting the key pin to be a blackboard key variable named PatrolLocation, you need to set this variable to be instance editable. then in the behavior tree, the PatrolLocation variable will be visible on the BTT_FindRandomPatrol task node. you need to set the variable to input to the PatrolLocation blackboard key from the dropdown.