The Mages from the company left.
They had created the initial form of the mortal district, and it only needed to grow naturally by now.
As the Mages left, the food deliveries for the mortals stopped.
However, the farms they had created were already bearing fruit. Of course, just a couple of weeks would have never been enough to complete a crop cycle, but there were plenty of supportive Magic Circles that sped up the process.
Most of the mortals continued partying, but a few of them noticed that the farms weren't tended to.
Sure, they had food now, but what about in a couple of weeks?
Some people started complaining, but everyone just told them to shut up and mind their own business.