UE4 Texture is missing

I am just new to Unreal Engine. When I tried the Trees from the UE4 Library, why does the texture don’t show up. All the models with texture from 3ds Max were exported fine, but the foliage, plants of Unreal Library didn’t show up.

Hello Annie, without showing/telling which library you meant, how you imported them, how the trees look in the mesh viewer, and how their materials look in the material editor… it will be very very hard for us to tell you whats going on.