Hi. Opening your save file in a text editor, I see only "nul" a lot, so the file is probably corrupted. When I open one of my own save files, it starts with something like: "LcfSaveDatadJîBsÅ6Çå@Random"
It's possible the game will work better in a different location (it may not have permission to create the save file properly), or something else is going on with the game. I always save on multiple different save files just in case something breaks or I get stuck.