The game server may be under maintenance to improve the performance and make important fixes or updates. We are working to provide you with an advanced game version without issues.
Don't worry if the game is unavailable now because we are very keen to serve you, and if you are in the game, you will be notified that the server will be restarted.
This process will only last a while; you will always retain everything from your progress.
In case the maintenance takes more time than usual, players will be notified via in-game announcements.