Hey there I'm dealing with the same issue with my VSFavatar format. I'm thinking it might have to do with the blendshapes? Maybe this program will not work with blendshapes that add things to the head face and arms? For example I have a hat I can put on with a hot key by hiding the assest and setting up and animation thru Unity. Any luck on a fix to this? Because it kinda limits people who use VSF format. Or is this a user error that can be fixed?