Importing Mesh Error

I have this error that pops up whenever I try to import an FBX file that I have done UV editing on. When I hit “okay” it appears but there is no colors or shadings on it that I have done in Blender. Is there any solutions or ways to get around it besides importing it in two separate pieces and coloring it in studio?

Error:

What I’m trying to import:

Thanks for the help!

the shading isn’t there because you probably used materials
if not
idk what to tell u