Session not Generated in my facebook sdk Api after Login

Hello i am using facebook sdk version 4.0 for post image but after login in facebook for image post its not generated session.

if($session) {
    try {
        // Upload to a user's profile. The photo will be in the
        // first album in the profile. You can also upload to
        // a specific album by using /ALBUM_ID as the path
        $response = (new FacebookRequest(
            $session, 'POST', '/me/photos', array(
                'source' => new CURLFile('banner.png', 'png'),
                'message' => 'User provided message'
            )
        ))->execute()->getGraphObject();

        // If you're not using PHP 5.5 or later, change the file reference to:
        // 'source' => '@/path/to/file.name'

        echo "Posted with id: " . $response->getProperty('id');

    } catch(FacebookRequestException $e) {
        echo "Exception occured, code: " . $e->getCode();
        echo " with message: " . $e->getMessage();
    }
}
else
{
    echo '<a href="' . $helper->getLoginUrl() . '">Login with Facebook</a>';
}

Here when i login in facebook i got one blank page and my url generated like bellow

http://ift.tt/1MYlcyU

Please help me for solved this problem . Thanks In Advance.