I think I know how to fix this
At what point of the game did you save?
The reason why this bug keeps popping up is due to the way save file names are generated and loaded (the variable with the save file name is parsed by the save and load screens to split off the little save file icons with your background and who your lounge manager is, etc.)
There's an if statement where if your save file has none of these icons it defaults to another format for the save file name and that is what is causing the error
I need to know what that point of the game is