Is retargeting broken ?

Summary

I’ve followed a tutorial for retargeting wildlife to the Fortnite wolf/boar skeleton mesh and it didn’t work so i thought I’m doing something wrong.
I contacted the author of the tutorial and he tested numerous previous rigs he had done and nothing is now working. I dont have the full knowledge of this system but he does and we both strongly believe its broken

Please select what you are reporting on:

Unreal Editor for Fortnite

What Type of Bug are you experiencing?

World Building

Steps to Reproduce

I will post the link to the tutorial video.

Just follow that.

Expected Result

It should work like the tutorial video

Observed Result

The retargeted mesh never retargets so its like the mesh is just moving about and not making the limbs ect move

Platform(s)

pc