When I build the foliage, it gets darker

When I build a foliage, it gets dark even if it is not in the shade.

((If building as shown in the first image, it will look like the second image. )

The error message shows the following, but I am not sure what steps to take. Can you please tell me about it?

「InstancedFoliageActor1: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.」