We apologize for the inconvenience.
Due to an issue discovered in the v1.073 update that rendered the game unplayable, we have rolled back the update as an emergency measure. We will update again once the issue has been resolved.
Users who encounter a gray screen while entering the game should exit the game, update to the rolled-back version, and then restart the game to resume normal play.
Once again, we apologize for the inconvenience.