Light Maps Won't Work with Android Vulkan.

I have enabled all of the settings and am wondering why bake light maps is still greyed out.Other preview settings work but I need it to be set to android vulkan mobile.
Any help on this is much appreciated

Late reply, posting this in case anyone else stumbles upon it:

Turn the preview OFF, bake the lighting, turn the preview back on.
This applies to both GPU lightmass and the ‘classic’ CPU lightmass