title: FCM Token retrieval failed RST
body: <p>I'm doing a GCM to FCM Migration for my app. But when testing my final code on a device I get the following error in my Logcat and the call to Firebase fails.</p>
  
  <pre><code>E/FirebaseInstanceId: Token retrieval failed: RST
  </code></pre>
  
  <p>There is no information in the Firebase docs what "RST" means etc.. </p>
  
  <p>Who can help me out?</p>
  
  <p>EDIT</p>
  
  <p><a href="https://i.stack.imgur.com/ycB4i.png" rel="noreferrer"><img src="https://i.stack.imgur.com/ycB4i.png" alt="enter image description here"></a>
  <a href="https://i.stack.imgur.com/LGYis.png" rel="noreferrer"><img src="https://i.stack.imgur.com/LGYis.png" alt="enter image description here"></a></p>