In the example scene, SpineBoneFollower's target is set to TargetSpineboy_Blueprint.
I can replicate the same thing in my project, and it works fine, if the blueprints are in the in the World level, but if I try to do the same inside a blueprint, the SpineBoneFollower target doesn't let me select the Spine skeleton. If I try to do the same in the example file and put TargetSpineboy_Blueprint and BoneFollower_Blueprint and add a SpineBoneFollower to it, it also doesn't let me set the target to TargetSpineboy_Blueprint, so it's likely not my project settings.
