php - Facebook OpenGraph GraphObject is returning empty object -

i'm trying read ratings facebook page display externally, using php sdk. have long live access token, , have been able use pull in main page data, when try access /ratings endpoint, receive empty array ( )

class facebookreviews {     protected $session;     protected $page;     protected $ratings;     protected $appid;     protected $appsecret;      function __construct($appid = null, $appsecret = null)     {         session_start();         $this->appid = '123456789123456';         $this->appsecret = '1234567890abcdefghijklmnopqrstuv';          facebook\facebooksession::setdefaultapplication($this->appid, $this->appsecret);         $this->session = new facebook\facebooksession('long live access token generated on graph api');          try {           $this->session->validate();         } catch (facebook\facebookrequestexception $ex) {           // session not valid, graph api returned exception reason.           echo $ex->getmessage();         } catch (\exception $ex) {           // graph api returned info, may mismatch current app or have expired.           echo $ex->getmessage();         }          try {             $this->page = (new facebook\facebookrequest($this->session, 'get', '/123456789123456/ratings'))->execute()->getgraphobject()->asarray();         } catch(facebook\facebookrequestexception $e) {             echo "exception occured, code: " . $e->getcode();             echo " message: " . $e->getmessage();         }     }      public function result()     {         return $this->page;     } }  $reviews = new facebookreviews();  print_r($reviews->result()); 

if remove /ratings request uri, returns data fine, mentioned in there doesn't work.

i generated long live access token own account, has admin access page