I tried to export a large scene and got an error. Finally I found that a rectangular light was the reason. Please, during the export process add an info, that lights are not supported and will not be exported and doesn’t stop the export.
Some lights are supported, just not all types. Maybe it would be better to list all the lights that weren’t exported? Maybe something like Light 'dining room' (area light) not exported
OK, for me a simple solution would be good enough, for example “2 area lights and 1 linear light are not exported”. Most important is that the FBX export doesn’t stop with a general failure.