Accidentally deleted "Light Source". New Light Source does not update Sky Sphere?

I accidentally deleted my “light source” during editing.
Now for the tutorial I’m doing I need it back, so I can add it back in, but the tutorial tells me that “refreshing” the BP_Sky will update the sun position.
The directional light I have added back does not do this. It does however work in other levels.
Rebuilding my landscape and foliage in the new level will take ages.
Anyone have advice?

You need to reference your light actor.