I am getting this same exact error at turn 391-392, laughing god of iastur

Same here, turn 412, Cordyceps
No active mods, no turn limit

When this error occurs, I cannot click on the "End Turn", "Use power" and "Create agent" buttons anymore.
I tried to start a new game (without closing the game completely). When cycling through the available gods for a new game, I get the 2nd error message as OP.
Something with startCivilWar when I interpret the exception right.

You have to restart the whole game. Even after a loaded or new game (without restarting) the three buttons do not work.

If my memory is right, that dumb debug message at the bottom appears if we hit enter or space bar too quickly. You need to click close on the center of the bottom of the screen to get it out of the way. My game works fine afterwards.

Originally posted by The Grand Mugwump:

If my memory is right, that dumb debug message at the bottom appears if we hit enter or space bar too quickly. You need to click close on the center of the bottom of the screen to get it out of the way. My game works fine afterwards.

I've tried hitting close on it, doesn't work. Clears the message but the game is still busted until I restart and the save file will always break within a turn of that exact same turn, regardless of what I do beforehand.