You can do what i do when i get them, which lately have been really rare.
1. Go to the LAST autosave (you should save every turn).
2. When the game starts, go into the WD and SAVE the game there at that point (name it something).
3. Go to Document/My Games/Beyond the Sword/Saves/WorldBuilder/(whatever you named it), take this and place it into the Rise of Mankind/PrivateMaps (here)
4. Press/start (your named game) here only. It should bypass what ever was holding it up, if not do it again from the next to last game etc. But mine always work.
Plus you can at that time change anything you want like a fresh game.