UE4 What do you do when a blueprint says invalid lightmap settings

Downloaded a 3d model imported it and i put it in the level and it says invalid lightmap settings

Here is another one

I took a video to for extra but my main question is how to fix this.

Thank you
A UE4 User


very small lightmap resolution or UV channel not suite for lightmap.

you can set mesh as dynamic and engine will not use lightmaps (lower performance,quality) or you can try increase lightmap in the details tab

before check UV in the mesh and read this Unwrapping UVs for Lightmaps | Unreal Engine Documentation