Same for me, I play for hours, save the game manually and when I restart the next day, the saves are not recognized. Happened several times now. Stop playing now until this is resolved, would be a great game without that failure.

Happy for you, Aragon10  

Sadly for me (at the time), I did look at the various save directory, yet none where to be seen.

Since my original post, I tried for a couple of days, fearing that I'd have to erase and reinstall the game (and hope it stops doing that), and it eventually stop doing it for no apparent reason, since I had not erase and reinstall the game. I managed to play a complete game (lovely game btw) over the course of 2 days, but havent had time to retry since (lack of time from work).

Hopefully, saving will remain functional from now on.