i have tried searching help on this topic before!
i have hade this problem on at least 10 different games and each time it hurts.
only in fm 11.
the only suggestion i got was to keep backup of my current save games.
i do not think corrupt saves are retrievable.
basically the reason why you get this error is because:
if the game is in the process of saving and the game suddenly is closed (maybe from a reboot or a end of the process) it doesnt save fully and thus cant be loaded usually there is a back up game made tho...
hope this made sense and prevents any future problems