Facebook Messenger customer chat plugin is not working

Question

We have tried to integrate Facebook Customer Plugin to one of our websites. We followed the instructions in the developer documentation, but it‘s not working. At first we get this notifacation with provided url and when you click on it says that „The provided app ID does not look like a valid app ID“.

First notification:

Second notification:

We used this codes:

1) Facebook SDK

<script>
  window.fbAsyncInit = function() {
    FB.init({
      appId            : '1983831301869331',
      autoLogAppEvents : true,
      xfbml            : true,
      version          : 'v3.2'
    });
  };

  (function(d, s, id){
     var js, fjs = d.getElementsByTagName(s)[0];
     if (d.getElementById(id)) {return;}
     js = d.createElement(s); js.id = id;
     js.src = "https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js";
     fjs.parentNode.insertBefore(js, fjs);
   }(document, 'script', 'facebook-jssdk'));
</script>

2 ) Customer Chat Plugin

<!-- Load Facebook SDK for JavaScript -->
<div id="fb-root"></div>
<script>(function(d, s, id) {
  var js, fjs = d.getElementsByTagName(s)[0];
  if (d.getElementById(id)) return;
  js = d.createElement(s); js.id = id;
  js.src = 'https://connect.facebook.net/en_US/sdk/xfbml.customerchat.js';
  fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>

<!-- Your customer chat code -->
<div class="fb-customerchat"
  attribution=setup_tool
  page_id="1983831301869331"
  theme_color="#c43627"
  logged_in_greeting="Sveiki! Kuo galime padëti?"
  logged_out_greeting="Sveiki! Kuo galime padëti?">
</div>