Error with ue4

Hi guys…
I have downloaded the new version of unreal engine 4.8.7
But when i set directional light show me only much “Preview” Like this
http://s29.postimg.org/xwhfbjec3/Immagine.jpg
How can i resolve or can i downgrade the version of unreal engine?

Have you tried to build the lighting? If not, click the “Build” button in the top ribbon next to the play button.

While you work to bring sample map UE4?

hello

But you do not have a light :v, it has an overall light only this if you have a window falls outside of the house you created.