Why is my skylight not working even with another light source and skylight added?

Hi everyone, new user of Unreal Engine 5 here. I have just started MA Game Art Design course and I am trying to skill myself up on UE5 by watching UnrealSensei’s 5hr tutorial.

However, for a reason I just CANNOT work out, my skylight has no effect… Nor does spotlight or rectangular light. Only directional light or point light shows any effect.

Someone please help! :frowning: