title: Firebase Cloud Messaging Push Notificartions don't arrive on iOS anymore
body: <p>I have a problem with Firebase Cloud Messaging on iOS. I have implemented Firebase into the app like stated in the docs and a Firebase instance id is generated. However, if I try to send a push notification (for example using <a href="http://pushtry.com/" rel="nofollow noreferrer">http://pushtry.com/</a>), nothing happened. The thing is, it <em>did</em> work, and I don't remember changing anything to do with notifications.</p>
  
  <p>Because I couldn't find anything, I even tried deleting the whole project and doing everything again from scratch (by copying the code). Then it worked again, but now (an hour later) again, it again doesn't work.</p>
  
  <p>If I send a FCM from pushtry or from the Firebase Console, it says the message is delivered, but nothing happens! (Push notifications are enabled in the iOS Settings. It did work)</p>
  
  <p>I really don't know what to do. Does anybody know about anything I could do?</p>
  
  <p>Thank you in advance.</p>