Erik, you have two problems, 1, the neutral going from that box to the panel is missing, not working etc. 2 someone recognized that and instead of properly repairing or replacing the wire, they used the ground somewhere as the neutral.
That said, you posted your website in your signature. I was looking at it, and was struck by a couple of things.
Looks good, has a very nice LOOK. To me. Wish I had one that looked as nice.
You have a photo shopped picture of some commercial or industrial conduits as the main background, but EVERYTHING on the site references residential. Sup wi Dat?
The picture showing the backyard, I had a little funny feeling when I saw the words " Make your garden come ALIVE", made me think you were either a landscaper, or left some live wires in the backyard.
BTW, Welcome to the forum. You should wander over to introductions
and post a little about your self.