This error is happening:

I had to change the plugin file to make it work. I think it can help someone and even the plugin's author should consider making these changes.

on class-admin.php, create this function at the beggining (can be line 9):

function loadXmlByCurl($url){$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_HEADER, false); curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
$xml = curl_exec($ch);
curl_close($ch);$xml = new SimpleXMLElement($xml); return$xml;
}


Now replace this line

$dom_object->load("http://www.facebook.com/translations/FacebookLocales.xml");  by $xml = loadXmlByCurl("http://www.facebook.com/translations/FacebookLocales.xml");
$dom_object = dom_import_simplexml($xml)->ownerDocument;


and you are ready to go.