Update 2: I think I figured out what was going on.

In my unique circumstance, then hang-up was caused by destroying (not capturing or defeating, literally eradicating) a city outright. The problem occurred with only one specific city; I was able to destroy others without problem.

My advice for those of you who are experiencing hang-ups: Reload an earlier autosave and determine where the hang-up is occurring - or more specifically, what action or interaction is causing it. Document it if you want and avoid the interaction, and that should allow you to progress through the game. It took me about 30m of trial and error before I realized it was a specific city's destruction that caused the issue (and the method, timing, or anything else didn't appear to matter).

New game, Harappans (again) turn 68

FF_Ninja wrote:

Update 2: I think I figured out what was going on.

In my unique circumstance, then hang-up was caused by destroying (not capturing or defeating, literally eradicating) a city outright. The problem occurred with only one specific city; I was able to destroy others without problem.

My advice for those of you who are experiencing hang-ups: Reload an earlier autosave and determine where the hang-up is occurring - or more specifically, what action or interaction is causing it. Document it if you want and avoid the interaction, and that should allow you to progress through the game. It took me about 30m of trial and error before I realized it was a specific city's destruction that caused the issue (and the method, timing, or anything else didn't appear to matter).

Thanks a ton, I've also just destroyed a city by nuking it, and then attempted another one - the nuke was a dud. I'll experiment with replaying the last turns. Your comment gave me hope that there's still hope for that playthrough

Same issue, first encountered at turn 219 and tried to reload from both autosaves and regular saves, to no avail. I started a new game and ran into the same issue in the industrial era, different civ, map and players. Was able to get around it by loading previous saves but got stuck again a few turns later with no way to end the turn (pending indefinitely) 

Incredibly annoying especially when you're so far into the game. 

Tip: I saved the game while end turn was pending and was able to move units as if the turn ended, but actual turn number is stuck, as is the construction queue and research progress

Same issue. I have to save and load every turn to get to the next turn. Some people have it fixed forever by doing that once...

If still not working for anyone, and tried everything else. I found something that works for me.

Menu in game - Save - Save on cloud, check the box - uncheck the box - saves should reload - resume and load into next turn (hopefully)

I have same the problem... The Problem first appeared on Turn 446 (Modern Era). After that, i tried manually saving and then loading this Savegame but it didn't helped.

Then I loaded a bit older Savegame (Turn 436), which then also had the error, although the Savegame was okay before the Bug appears.
I had to go back almost 50 Turns, before I found a usable Savegame. Only to find out that the error pops up again later (Turn 521).

I almost have the Impression that it is due to the Amount of Information (Number of Cities, Number of Units, Mapsize, Buildings done at the Turn, AI Movement at the Turn, etc.).

Otherwise the game runs flawlessly in 4k and the highest Graphics Settings (i7 9700k, RTX3060 12GB, 16 GB DDR4 RAM, WIN 10 Pro).

I'm really annoyed, yet. I had really much Fun with the Game, but it is unplayable at the Moment.

same, happened on 3 different saved games now. always had to start over... no solution online