Crash to desktop when trying to return to Magwytch Marshes

I am unable to return to Magwytch Marshes, my game now crashes after every attempt.

I did have a few crashes when originally travelling to Magwytch Marshes, but i was able get into the map and finish the quests there.

Later when i was travelling between the marches and my respite to transport resources, i found the game would crash a lot going to the marsh, but i was able to continue with repeated attempts. I would estimate i would have 1 success for every 3 failures or so.

I validated my game files on Steam many times during this process, and every time all files passed validation.

Today i was trying to get back to the marsh to defeat the boss again to get more boss resources and my game crashed every time. As of now it appears i can no longer enter this realm.