We are receiving reports that some commanders are getting a Black Screen when trying to access Alliance War or Operation Killswitch. Thank you for bringing this to our attention. The team is already looking into this matter. We also encourage you to do some troubleshootings steps that may help you resolve this issue. Just click the link below and follow the instructions.
http://zynga.my/iOS
http://zynga.my/Android
Also, make sure that you have the updated game version. You may check your App Store (iOS) and Play Store (Android) for updates.
Please stay tuned as we will give you an update on this as soon as we find a fix.
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Empires & Allies Game GUIDE