Melee block Blendspace

Alright. So I googled to find tutorials on bone rotations and found this one helpful: UE4 Character Look At Tutorial - YouTube
I did everything he does except that I put the Transform (modify) bone-node inside the AnimGraph and instead only rotating the head I tell him to rotate pelvis. (it says “spine_01” in the picture because I was playing around at that moment.)
But I am getting weird warnings and I can’t find anything in the web:

This is how everything looks like now:


and at the end of the UpdateAnimation Node inside the Event Graph (AnimBP) I call the function like this:

In the preview the bone rotates fine. I’m having weird timing issues and have no clue how to fix that or don’t know where to even look.