We find that we have to go into pretty much all of the materials that are created and adjust the Base Texture and a couple others from LinearColor to Color and save them in order for them to compile. Is this normal? Are we doing something incorrectly?

Please help to check the following things:
1. Make sure you dragged the FBX file only, not along with texture files.
2. Which shader you chose? (Standard, LW, HQ)
3. What textures you have to manually adjust? 

Thanks!