skysphere_bug

I’m doing a small project, and the actions in the game take place in the dark. I deleted bp_skysphere, then I decided to see how the game looks during the day. I dragged the skysphere from the startermap map to my map, in the end I did not like the way the game looks and I deleted the sky. And it turns out I don’t have a skysphere in the startermap and in the firstpersonexamplemap. Now, every time the engine starts, the error “Failed to load bp_skysphere.” Experienced users please help