Hello Habardgames, and thanks for the fast answer.
I deleted the game in between, having reached the end of the current version.
I downloaded it again to answer your request.
I tried to run in the same issue, but i can save just fine.
It may be an issue of corrupted data during my last download, knowing that my internet connection isn't the best.
Or maybe you looked into it and fixed it in the meantime?
In any case all is good and i can save just fine now.