Blender 2.8 - Texture not showing up on material preview, neither exporting to .fbx file (Ok, so i've looked it up, and none of the answers to other simillar questions helped. I'm getting desesperate)

I created this model on Blender 2.8. I configured the material settings, unwraped the texture in uv map, assigned materials and everything. The textures are properly shown on shading mode, but on material preview it doesn't show up, neither when i try to export to a .fbx file. But the texture of the shirt is working. Nodes are enabled. All settings look the same, i can't find out what's wrong.





Project File Link Please, i need help!

//Edit: the texture was showing up on material preview before.
Thank you very much guys! I didn't know i couldn't export more than one uv map on an .fbx file. Now that i delleted all the other uv maps, the face texture is finally showing up when i export the file. I really appreciated your help. Thank you!