I just ran into a game-ending bug. I've unlocked a few districts, but the game won't let me place ANY of them. As seen in the screenshot below, I clicked Government Plaza, and the available locations are highlighted, but clicking on any of the tiles does nothing. Same with the other districts. First, I tried quitting and restarting Civ 6, but that didn't help. Then, I disabled the 3 mods that were still enabled from vanilla, but that didn't help. Lastly, I verified the Steam files, but that also didn't help. Have any of you experienced or heard of this issue?
So effectively, I just wasted the last 3 or 4 hours. I guess I'll eventually start a new game and hope that it doesn't happen again.