Character Model Issue

Ay, so I’m currently trying to figure out how to import a MMD model into TU as u can do in VRChat (I know it’s different game engines, but still curious) but i haven’t had much luck lately. I can import it sometimes, but when it goes it’s either i get the error i posted below OR when it imports fine it’s just showing as the default TU Model.

At this point i’m not sure if u can import MMD models, but if anyone can assist with this error it would be appreciated.

Link to error i stated previously:

I might add, i tried making the materials single but that’s when i run into the problem of just the character model showing up as the default TU Model.