Hello
In your site we only edit in module JS Facebook Popup and no change any in your site. Please delete cache in your site and check it
In module JS Facebook Popup in file modules/mod_js_facebook_popup/helper.php in line 14 we have changed
<script type="text/javascript" src="<?php echo JURI::root(); ?>modules/mod_js_facebook_popup/tmpl/js/all.js#xfbml=1"></script>
To
<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 = "//connect.facebook.net/en_US/sdk.js#xfbml=1&version=v2.5&appId=168172159911263";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));</script>
Best regards
Bach Pham