When I click on the “Citizens” button, the window opens up without listing any of my citizens.
Several issues preceded this, which I suspect are related:
I had a blacksmith’s workshop which was not producing any of the queued items, despite plenty of supplies. I destroyed the blacksmith’s shop with the intent to rebuild it. When I select the Blacksmith after the workshop was destroyed, there is no “place workshop” button as expected. Instead, there is only a “Show Workshop” button, which does nothing when clicked. I believe it was at this time that the “Citizens” window also started coming up blank.