I had it happen to me on my PS4 about two weeks ago. It was a pain, but I reinstalled it after about 5 hours. That said, I have no idea how the files became corrupted, as I'm always careful to close all applications from their main menus before shutting the PS4 down. I've had save file corruption issues with auto-saving games in the past, so returning to the main menu's become second nature, even on games with manual saving.