login with facebook php อัพขึ้น server แล้ว error ครับ ช่วยหน่อยครับ

<?php

/* INCLUSION OF LIBRARY FILEs*/
	require_once( 'lib/Facebook/FacebookSession.php');
	require_once( 'lib/Facebook/FacebookRequest.php' );
	require_once( 'lib/Facebook/FacebookResponse.php' );
	require_once( 'lib/Facebook/FacebookSDKException.php' );
	require_once( 'lib/Facebook/FacebookRequestException.php' );
	require_once( 'lib/Facebook/FacebookRedirectLoginHelper.php');
	require_once( 'lib/Facebook/FacebookAuthorizationException.php' );
	require_once( 'lib/Facebook/GraphObject.php' );
	require_once( 'lib/Facebook/GraphUser.php' );
	require_once( 'lib/Facebook/GraphSessionInfo.php' );
	require_once( 'lib/Facebook/Entities/AccessToken.php');
	require_once( 'lib/Facebook/HttpClients/FacebookCurl.php' );
	require_once( 'lib/Facebook/HttpClients/FacebookHttpable.php');
	require_once( 'lib/Facebook/HttpClients/FacebookCurlHttpClient.php');

/* USE NAMESPACES */
	
	use Facebook\FacebookSession;
	use Facebook\FacebookRedirectLoginHelper;
	use Facebook\FacebookRequest;
	use Facebook\FacebookResponse;
	use Facebook\FacebookSDKException;
	use Facebook\FacebookRequestException;
	use Facebook\FacebookAuthorizationException;
	use Facebook\GraphObject;
	use Facebook\GraphUser;
	use Facebook\GraphSessionInfo;
	use Facebook\FacebookHttpable;
	use Facebook\FacebookCurlHttpClient;
	use Facebook\FacebookCurl;

/*PROCESS*/
	
	 session_start();

	 $app_id = '1448334198760505';
	 $app_secret = '84effeb7814e98e7d32c55ef30acbe21';
	 $redirect_url='http://foodcourt.esy.es/';
	 
	 FacebookSession::setDefaultApplication($app_id,$app_secret);
	 $helper = new FacebookRedirectLoginHelper($redirect_url);
	 $sess = $helper->getSessionFromRedirect();

	 	if(isset($sess)){

		$request = new FacebookRequest($sess, 'GET', '/me');

		$response = $request->execute();
		$graph = $response->getGraphObject(GraphUser::className());

		$name= $graph->getName();
		echo "hi $name";
	}else{
		echo '<a href='.$helper->getLoginUrl().'>Login with facebook</a>';
	}

?>