UE5.0 Landscape Layer Blend Issue

It is 2025 and I do not understand what is going on but I can’t get the Landscape Layer Blend to work. I have followed numerous tutorials on Youtube but the result is always the same. It is not just about the preview material window. With the M_Landscape material assigned to my Landscape, nothing shows up. its all grey and dark.

No material assigned to landscape

Material assigned to landscape

The M_Landscape material