Well it’s hard to tell from here what’s wrong. You should not remove the light importance volume this will definitely rise build times.
Can you start a completely new Project and build the light in it? Does that work?
If so, try migrating your level from the old project to the new one. If it breaks you could start by removing stuff and see what causes the lightbuild to hang.
If not, try uninstalling and reinstalling the Unreal Engine.
That’s how i would go from here.