Lighting doesn't work

I’m adding lights just like at 4:30 of this video. Basic Unreal Light Tutorial - YouTube

They get the lights previewing in the viewport but in my scene remains black. Any ideas?

Can you post a screenshot of your viewport?

Depending on the light you are using the angle may be off and not facing anything the intensity may be to low or several other things

I just installed 4.10.2 and it’s working now. I really don’t understand what happened.

Anyway thank you for getting back to me.