title: Google Cloud Messaging service does not work properly. Unable to view or upload new APNS certificates
body: <p>Today I found that iOS application doesn't receive push notifications (we use Google Cloud Messaging service). I tried to check the expiration date of certificates uploaded to GCM and found a strange bug with GCM <a href="https://developers.google.com/mobile/add" rel="nofollow noreferrer">configuration page</a>. I unable to upload new certificate</p>
  
  <p><a href="https://i.stack.imgur.com/lHWVS.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/lHWVS.png" alt="enter image description here"></a></p>
  
  <p>Is there any alternative way to check uploaded certificates?</p>