Stuck on Choose Belief

I'm playing my first solo game through this and I ran into what I assume is a bug. I founded a pantheon and a religion, and eventually had enough for an apostle which I tried to use to add a bonus belief. Once I sacrificed it, I got the prompt in the bottom right to choose belief, but clicking it makes a noise as if it pulled up the religion window to select, but nothing appears. The same happens when I click the religion button in the top left. All DLC is on for the game, I disabled it and restarted and it still doesn't work. I'm aware I can still proceed to the next turn, but the religion aspect is a pretty big part of the game, so I'd like to figure out how to resolve this. Any suggestions?