sorry this model is pack model....... you have import the text package and open the text than copy the link
step 1 : import the SDK step 2 : import the avatars and wating step 3 : find the avatars and drag tne SDK seting avatars step 4 : uplode the avatars and you can use the avatars
So i've tried this model in three separate unity projects only for once I go to upload the model the project as a whole deletes everything in the assets folder including the model itself. After testing this with other models in different projects I have no problem whatsoever just this one.