1)CUA must have SkinedMeshRenderer which has (part of) G2F compatible bone. your CUA has these?
2)currently plugin supports 1 Skinnedmesh Renderer, if your CUA contaions 2 or more SkinnedMesh Renderer, Separate prefab.
I cannot remind other reason without CUA information you tried.
2)currently plugin supports 1 Skinnedmesh Renderer, if your CUA contaions 2 or more SkinnedMesh Renderer, Separate prefab.
I cannot remind other reason without CUA information you tried.