The update for the iOS version is not available yet on the Apple App Store.
The iOS version is expected to be available for Apple App Store on April 1st, 5AM. (UTC)
Game crash may occur but you are able to participate in the event during this period.
We will post an announcement once the issue has been resolved. Once you download the update version, you will be able to access the game without any issues.
For Android users, you can proceed with the update and access the game without any issues.
We are sorry for the inconvenience.