Looking at your source code, the sdk.js is being included twice. This is slightly different from the normal problem of the two conflicting all.js and sdk.js libraries being added. I am not sure if you'd actually run into any functional problems with the sdk.js library being added twice. However, we'd still recommend removing it in case it does interfere with any functionality and would help speed up your page load, etc.
At least from the comment in the following code block on your page., it looks to be coming from an extension adding fonts. This might help you narrow it down more.
<script type="text/javascript">
WebFont.load({
google: {
families: [ 'Open Sans', 'Open Sans Condensed', 'Ubuntu Condensed' ]
}
});
</script>
<script>
window.fbAsyncInit = function() {
FB.init({
appId : '1733226926904678',
xfbml : true,
version : 'v2.4'
});
// ADD ADDITIONAL FACEBOOK CODE HERE
};
(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";
fjs.parentNode.insertBefore(js, fjs);
}(document, 'script', 'facebook-jssdk'));
</script>
<!-- end font google -->
error in site check
