If your system shut down or crashed mid-save then the file will be corrupted and cannot be fixed.
Likewise if you game has been force closed for any reason there is a chance of save game corruption.
The only opportunity to get the save back is to try and use Windows ‘Restore Previous Versions’ function. This will not always be on by default so may only work for some users.
To use this functionality, first go into your 'Documents' folder. Within there should be a Sports Interactive Fol