Assassin's Creed Valhalla's crashing issues have not been permanently solved yet, but the development team at Ubisoft does have a temporary solution. A new hotfix should let you head back to Ravensthorpe without the game crashing. However, you'll have to sacrifice a few features, for now.

Settlement decorations appear to be behind the crashes, so those have been removed from the game, as have quests for the Ostara Festival that involve those items. Once the permanent fix is out, these should be back in the game, but you'll have to wait a bit. Ubisoft set a window of "sometime next week" for the larger, permanent fix.

It's an issue that has only been in the game for a brief period--at least to this degree--so if you've taken more than a few days off from playing Assassin's Creed Valhalla, you likely haven't even noticed it. Prior to this, the game did have some technical issues, like characters' mouths not moving when they spoke or legs not moving when they ran, but crashing seemed to be relatively infrequent. In my own experience, I had one crash in more than 50 hours, and it came as I tried to fast travel away from Ravensthorpe.