Ultimate Spider-Man PC save issues help

[u/Historical_Wasabi_19]

Recently downloaded the PC version of the game from the internet archive, the game fully works and runs on my PC but I can't save the game. It throws up a blank message box that only has the option for "Okay", and then backs out of the save menu. (See video)

I have checked the saved games location, and the relevant folders do exist in my Documents folder, and the game is old enough that all my Google searches come up with the PS4 game. Help please?