My two test devices can both send and receive notifications using all the code on the backendless website for ios notifications setup.
However, it can only register for notifications the first time the app is opened, the next time it throws an error (see below). I am also using FBSDK to handle facebook login, but it seems to work fine (i have checked it) the for the first login and all times after that if “registerForNotifications” is NOT called.
Server reported an error: FAULT = '-1001' [NSURLErrorDomain] <The request timed out.> FBSDKLog: WARNING: FBSDK secure network request failed. Please verify you have configured your app for Application Transport Security compatibility described at https://developers.facebook.com/docs/ios/ios9