I think you've placed the game in a folder that requires administrator privileges to write to. Please try moving the game folder to your desktop.
Unfortunately that didn’t work, the games entire folder is sitting standalone in my downloads folder and I’ve never had an issue until recently and I’ve had the game for probably almost 3 weeks to a month now
When you run into a save error, please press F12 to open the console and send me a screenshot of the error log.