title: Laravel Pusher Error "No Callback" Error
body: <p>I am trying to build real time Notifications using Laravel 5.3 and Pusher for my Web-Applicatin. I am able to push messages to Pusher debug console.
  My Server-side script:</p>
  
  <pre><code>$options = array(
                      'cluster' =&gt; 'ap2',
                      'encrypted' =&gt; true
              );
              $pusher = new Pusher(
                      'xxxxxxxxxx', // removed for safety
                      'xxxxxxxxxx', // removed for safety
                      'xxxxx', // removed for safety
                      $options
              );
  
              $data['message'] = ($user-&gt;name)." like your status";
              $pusher-&gt;trigger('my-channel', 'PusherEvent', $data);
  </code></pre>
  
  <p>And my Client-side Script:</p>
  
  <pre><code>&lt;script src="https://js.pusher.com/4.0/pusher.min.js"&gt;&lt;/script&gt;
  </code></pre>
  
  <p></p>
  
  <pre><code>// Enable pusher logging - don't include this in production
  Pusher.logToConsole = true;
  
  var pusher = new Pusher('xxxxxxxxx', {
    cluster: 'ap2',
    encrypted: true
  });
  
  var channel = pusher.subscribe('my-channel');
  channel.bind('PusherEvent', function(data) {
    alert(data.message);
  });
  </code></pre>
  
  <p>
  I want to get alert on my webpage.Javascript is enabled in my browser.My browser console shows something like this:</p>
  
  <pre><code>Pusher : Event sent : {"event":"pusher:subscribe","data":{"channel":"my-channel"}} pusher.min.js:8:2594
  Pusher : Event recd : {"event":"pusher_internal:subscription_succeeded","data":{},"channel":"my-channel"}
  Pusher : No callbacks on my-channel for pusher:subscription_succeeded
  </code></pre>
  
  <p>What might be the reason for this ??</p>