[novice] Scene is dark after Build lights complete

Going through a archviz tutorial but need some feedback on how to troubleshoot a lightmap issue. I have 4 spotlights set to stationary. The lights look fine in my viewport (see attached) However, after I Build the lightmaps my scene goes dark and it seems as though my spotlights have been turned off.

If I then toggle the spotlights from stationary to static I can ‘turn them on’ again but after a Build the same thing happens.

Any feedback appreciated!

It looks like some of your lights are blocked by your ceiling mesh, move them down a little. Also, some of your meshes could use a higher lightmap resolution