问图形返回一个错误:无法加载URL:该URL的域未包含在应用程序的域中

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$accessToken = $helper->getAccessToken();

$accessToken = $helper->getAccessToken('https://example.com/your-CallBack-URI-page.php');

session_start();
require_once __DIR__ . '/vendor/autoload.php';

$fb = new Facebook\Facebook([
  'app_id' => 'appid',
  'app_secret' => 'app secret',
  'default_graph_version' => 'v2.6 ', 
  "persistent_data_handler"=>"session"
  ]);
$helper = $fb->getRedirectLoginHelper();
$permissions = ['email']; // optional

$loginUrl = $helper->getLoginUrl('domain.com/php-graph-sdk-5.x/login-callback.php/', $permissions);
$_SESSION['FBRLH_state']=$_GET['state'];
try {
  $accessToken = $helper->getAccessToken('domian.com/php-graph-sdk-5.x/login-callback.php/');
} catch(Facebook\Exceptions\FacebookResponseException $e) {
  // When Graph returns an error
  echo 'Graph returned an error: ' . $e->getMessage();
  exit;
} catch(Facebook\Exceptions\FacebookSDKException $e) {
  // When validation fails or other local issues
  echo 'Facebook SDK returned an error: ' . $e->getMessage();
  exit;
}