3d Model Texture Error

I import 3d models from mixamo with animation. Everything ok but just error on my player face. Lıke there is a black mask. How can i fix it? I add photo this message. Thank u

 

Make sure you have enabled 2 sided option on 3d model you can find it in subscene on your face object if you went to fbx

 

I try select 2sided but doesnt work. Any thing not change. How can i fix it?

 

have you checked the texture? maybe its just the way its painted.
maybe the character has a weird mask on

 

I try this different models. When my player run, its look like this. I added a screenshot

 

I drag and drop fbx to buildbox