Blank citizen pages seem to be a long-running issue. I found it happening in 10.5-3, also after deleting a workshop, here:
And I feel like I’ve seen it somewhere else as well, but I can’t find any other reports. [Paging @8BitCrab.]
Also, what version of the game are you using? Steam or Humble Bundle? If you’re using Steam, are you playing on the stable or on the latest branch?