Hi, thanks for replying. & Oh, ok. I didn't know it automatically saved. I also didn't know about the quick save button, which mainly solves the problem. The main menu save still is broken I'm pretty sure because it closes the game and when it reopens, it didn't save.
Going to the save menu shouldn't be closing the game.
Can you send me a copy of the game log from a play session where you've tried to save from the main menu to the address listed under the "Technical help" section here on the store page (instructions on where to find logs are in the "Log, save, and config file locations" section)?