When Assassin's Creed: Valhalla 1.2.0 update was released, it brought new features like "Transmog" and a new event called Ostara Festival. However, it also caused crashes and different issues while players where trying out the event.
Fortunately, Valhalla's developers were fast and launched both a quick fix and a permanent solution (patch 220.127.116.11). Players haven't reported any new issues since. Considering many users couldn't enjoy Ostara Festival's content for days, the team announced that the event has been extended until April 15.