i am a beginner. Try to do this:

i do it 3 times now - the result is always a complete black thing and i always get errors: Warning Landscape_0 Instanced meshes don’t yet support unique static lighting for each LOD. Lighting on LOD 1+ may be incorrect unless lightmap UVs are the same for all LODs.

What i am doing wrong? i think i did it exact how it is written.