Default thirdperson character model importing transparent (error)

I just started to learn unreal engine and doing the first hour tutorial this started to happen when i click on PLAY.

VIDEO: https://drive.google.com/file/d/1NBp…ew?usp=sharing

dont even know the name of this error, please, help.

I read that is something to do with normal of the mesh, but i dont know nothing of it. I did nothing, just imported and didnt import correctly.

Please, help.

thank you very much