Widget shows as black, why?

Hi all,

I want to make a menu, I designed it as shown on the left of the screen, but in the game, it’s shown as black… Do you have any idea what’s the problem?

This is the tutorial video and I did all steps : Unreal Engine - 3D Menu Tutorial - YouTube

Is it at a certain distance it turns black, or is it completely black all of the time?

It’s black regardless of distance and lightening