I just started following the same tutorial with a mixamo character and i had the same result. Using root instead of the pelvis did it for me.
Ue tools is great btw… but i believe i already said that some time ago 
I just started following the same tutorial with a mixamo character and i had the same result. Using root instead of the pelvis did it for me.
Ue tools is great btw… but i believe i already said that some time ago