i did manage to get the game to work somehow still cannot get close to the quest can’t go any further since it’s the main story

So yesterday I wrote that I was having issues with the sons of Ragnar quest where if I would reach a certain distance of the quest it would crash my game. I’ve tried to get on today to do other things but it won’t let me start the game it says data corrupt I really don’t want to reinstall it is there any other way? I’m really disappointed I was looking really forward to playing this game

I cannot go to the quest once a reach a certain distance to the quest it crashes everytime ive went from land and from water and its the same thing i cannot go any further into the story since i cannot get to the quest ive already played 4 hours and theres no way im replaying it PLEASE HELP ME