UE4 Editor went dark and I don't why or how to fix it.

So I was just starting work on a level block out, moving the camera around, painting the terrain and suddenly the entire editor goes dark. Not just the world in the viewer but the entire UI around it. I have no idea how this happened or how to fix it besides going nuclear and reinstalling. But I’m hoping to avoid that. Anyone know what’s happening here or how to fix it?

I had a same question, did u fix it out?

Edit > Editor Preferences > Miscellaneous > Reset UI Layout