Device shows the following error the when the app version is missing from the plist. ``` Error registering with OneSignal: Error Domain=OneSignalError Code=400 "(null)" UserInfo={returned=<CFBasicHash 0x7fe9bb679980 [0x108ae5a40]>{type = immutable dict, count = 1, entries => 1 : errors = <CFArray 0x7fe9bb69f3e0 [0x108ae5a40]>{type = immutable, count = 1, values = ( 0 : <CFString 0x7fe9bb687ef0 [0x108ae5a40]>{contents = "Device type is not a valid device_type. Valid options are: 0 = iOS, 1 = Android, 2 = Amazon, 3 = WindowsPhone(MPNS), 4 = ChromeApp, 5 = ChromeWebsite, 6 = WindowsPhone(WNS), 7 = Safari(APNS), 8 = Firefox, 9 = Mac OSX"} )} ```