StaticMeshMorphTargets Material Function

So, I’ve been following these docs: Static Mesh Morph Targets | Unreal Engine Documentation

The second section that talks about the material… that thing just doesn’t work for me. My mesh deforms slightly in the wrong fashion but other than that, no morph targets. I am exporting from Maya, as the script is no longer available with UE4. Might that be the cause? If yes, is there an alternative way to blend morphs within materials?

Best regards,
Damir H.