title: InvalidApnsCredential while sending notification over GCM
body: <p>Since yesterday (21.2.2018) we receiving InvalidApnsCredential while sending push notification to ios devices over GCM. We checked certificate base on <a href="https://developers.google.com/cloud-messaging/ios/certs" rel="nofollow noreferrer">https://developers.google.com/cloud-messaging/ios/certs</a> and both certs (for development and production) are valid until feb/2019.. 
  I'm curious if something changed on GCM side .. couldn't find anything plus we didn't change our server side.</p>