I wanted to convert my face rig to blendshapes in order to send it to Unreal. but the problem is after I convert it, the face no longer deforms with controller. other extra mesh like eyes, brows, etc. works fine, although they leave multiple copies of itself, which I can delete manually. it gave me this error message : skeleton/AdvancedSkeleton.mel line 40447: The source attribute 'FaceDeformationFollowHead.worldInverseMatrix[0]' cannot be found.
select -r model:head_low.
it works on some of their demo models, except for blaze which gave me the same issue

