This bug was fixed in Patch 1.59.73
It does seem to work if you go to manage world and save there. I don’t have the issue and wasn’t able to verify that it works. It might be that some game progress is lost anyways.
To save your game, follow these steps:
- Click on Options –> Manage World or click on the button for Manage world in the upper right corner.
- You will be ask if you want to save.
- Click on Save and go to Manage World.
- It should then be possible to save the game again.
AHQ Beitrag für das Problem
Please post here if the workaround doesn’t work for you