How actually did you 'fix' not creating a save? And what was with that?
Also is everything on your PC up to date, Windows up to date, and is PC itself configured good?
Back in the time Imperator released, I bought it but refunded it because I didn't really like it at the time. I had an issue though.
It was similar in nature, saving games would sometimes crash the game and while my game did not crash on 31st december ( or maybe sometimes it did, I haven't payed attention ) it did crash whenever something 'big' was happening. Game ran perfectly though since I had a nice rig, or I thought so. And it was not a regular Paradox crash, but rather froze my whole PC
What this game did it pinpointed to me that my motherboard was bad. Was it the ram slots, was it something else, I do not know. I know I tried everything basically, even reinstalling Windows several times, and game still crashed.
Only thing that helped me was a new mobo, and everything was fine after that