For the love of unreal please help!

Alright, I just bought a whole bunch of assets to start on my RPG game, but no matter what I try, when I put them into the level they have no color. I even tried making new materials, but even in the material editor no color appears. I am using version 4.25.0. Please help? Is it my settings? I turned the graphics all the way down for the play testing, but even in the editor with them on high it doesn’t work.