My game save is corrupted.

At first, I built a building in my save file, but whenever I saved and quit the game, this save would crash at certain locations. And most importantly, I didn't back up the save! So no matter what method I tried, nothing worked. Oh my God, that was a year's worth of game progress! I can't just let all my hard work go to waste, so please dear developers, help me solve this problem. Thank you so much!