Fatal error: Uncaught Error: Class 'Facebook\Exceptions\FacebookSDKException' not found in /usr/local/apache/htdocs/plugin/social/libraries/Facebook/Exceptions/FacebookOtherException.php:31 Stack trace: #0 {main} thrown in /usr/local/apache/htdocs/plugin/social/libraries/Facebook/Exceptions/FacebookOtherException.php on line 31