first thing i would do is goto your settings section and goto storage and click where the game save is it on the harddrive ora usb save or on the cloud. if you find the red dead redemption file click on that to see what is there in you see a save file or
any file in there with a yellow mark that means the file is corupted and you need to delete that file and start a new game.sometimes things happen like this when files get coruptied.
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