Please check the version of the game in the app store and make sure you have downloaded the latest update.
Mobile Data error. Please Check your mobile data system, data error of the mobile will probably cause failure when playing the game.
Low phone storage: It is recommended to check whether the phone has enough storage.
Network connection error: Recommended switching connection between Wifi and 4G.
Incompatible phone operation system: Currently, the earliest operation system supported by AoV is: Android: 4.0.3 and above iOS: 8.0 and abovePlease make sure your device system is applicable and update your OS version if needed.
If the problem still persists, please try to re-install the game. Remember to bind your account with Facebook before re-installing to prevent losing your account.