title: [Firebase/Core][I-COR000020] Error posting to Clearcut: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out."
body: <p>I am using Firebase for push notifications in iOS.</p>
  
  <p>I am firing notification from Firebase console. How can I test notification using FCM registration token?</p>
  
  <blockquote>
    <p>New Message
    Target-User Segment-Add Target- iOS App</p>
  </blockquote>
  
  <p>I am sending message and response is displaying in logs.</p>
  
  <pre><code>{
  "collapse_key" = "Bundle Identifier";
  from =;
  notification =     {
      body = Test;
      e = 1;
    };
  }
  </code></pre>
  
  <p>I follow steps from the <a href="https://developers.google.com/cloud-messaging/ios/ios-migrate-fcm" rel="nofollow noreferrer">Migrate FCM doc</a>.</p>
  
  <p>I am getting this response but not able to see any notifications and I am getting also one error:</p>
  
  <blockquote>
    <p>[Firebase/Core][I-COR000020] Error posting to Clearcut: Error Domain=NSURLErrorDomain Code=-1001 "The request timed out." UserInfo={NSErrorFailingURLStringKey=<a href="https://play.googleapis.com/log" rel="nofollow noreferrer">https://play.googleapis.com/log</a>, NSErrorFailingURLKey=<a href="https://play.googleapis.com/log" rel="nofollow noreferrer">https://play.googleapis.com/log</a>, _kCFStreamErrorDomainKey=4, _kCFStreamErrorCodeKey=-2103, NSLocalizedDescription=The request timed out.},</p>
  </blockquote>
  
  <p>I am not able to understand what this error means, and why I am not getting notification and I am getting response.</p>