Can't save game

I just recently picked up this game, and when I first started playing, everything was fine, but now, every time I try to save the game, either full save or quick save, I am given a ‘permission denied’ error. I tried renaming the save folder and starting over, and the same thing occurred; it started out fine, but after a while saving gave me that error. How do I fix this?
Insurgence%20error

You might have to restart your computer to make it so nothing in the background is preventing access to the file anymore

Restarting hasn’t helped.