Call to a member function getAuthorizationUri() on null: Facebook Login Issue with Facebook Graph API Version 2.8

[sw-tt-aniruddhbhavsar]

Hi,

I have configured this package with laravel 4.2.17. When i am trying to create login with facebook i am getting an error "Call to a member function getAuthorizationUri() on null". I have created new App in Facebook with version 2.8 and set redirect url in config file same as configured in Facebook App.

Below is my code in Controller.php:

public function loginWithFacebook() {

// get data from input
$code = Input::get( 'code' );

// get fb service
$return_url = URL::to('/') ."/login/fb/";

$fb = OAuth::consumer( 'Facebook',$return_url );

// check if code is valid

// if code is provided get user data and sign in
if ( !empty( $code ) ) {

    // This was a callback request from facebook, get the token
    $token = $fb->requestAccessToken( $code );

    // Send a request with it
    $result = json_decode( $fb->request( '/me' ), true );

    $message = 'Your unique facebook user id is: ' . $result['id'] . ' and your name is ' . $result['name'];
    echo $message. "<br/>";

    //Var_dump
    //display whole array().
    dd($result);

}
// if not ask for permission first
else {
    // get fb authorization
    $url = $fb->getAuthorizationUri();

    // return to facebook login url
     return Redirect::to( (string)$url );
}

}

Below is my code in app/config/app.php:

'providers' => array(
    'Artdarek\OAuth\OAuthServiceProvider'
),

'aliases' => array(
    'OAuth' => 'Artdarek\OAuth\Facade\OAuth',
),

I have updated Facebook App client_id and client_secret in my app/config/oauth-4-laravel.php:

Also getting a same issue for Login with Linkedin, Google. Thanks in advance for help.