[Newbie] Missing Textures and BP_Sky_Sphere

So I’ve recently started getting into the Ark Dev Kit, and want to start producing a map, however, whenever I add a dirt plane to the map, it is untextured/checkerboard. As well as this, I had to import the BP_Sky_Sphere from the default/test map, since the new level didn’t have one. Can anyone help me out?

The screenshots show what I’m talking about. Any help would be greatly appreciated.