the only blender thing is keeping frenni's bone armature ON the coat when removed from frenni on blender, without it the coat of course wont have bones to connect
@badasqueen
As it states it seems like a VRCFury component is referencing a gameobject that is attached to the PC version of your avatar rather then the Quest version of your avatar. In the end you need to find where this component is in your quest avatar and check that they reference the quest avatar properly. You could also try using VRCQuestTools to convert the PC version to quest instead and it should fix it. Just depends on what you wanna do.
i was able to questify this one, it comes out really good, the only thing is the toggles don't sync to every world so you'll have to put the outfit you want back on, let me know when you start selling these, cant wait to see the rest of them