PHP - Problemas con api Linkedin

<?php

session_start();

// include hybridauth lib

$config = 'apis_src/hybridauth-2.5.0/hybridauth/config.php';

require_once('apis_src/hybridauth-2.5.0/hybridauth/Hybrid/Auth.php');

try {

    $hybridauth = new Hybrid_Auth($config);

    $adapter = $hybridauth->getAdapter("linkedin");

    $linkedin = $hybridauth->authenticate( "linkedin" );

    $user_timeline = $linkedin->getUserActivity("timeline");

	$userConnected = $adapter->isUserConnected();

	$user_profile = $linkedin->getUserProfile();

} catch (Exception $e) {

    die("<b>got an error!</b> " . $e->getMessage());

}

// logged in ?

if (!$userConnected || !isset($user_activity)) {

    $fullUrl = "https://www.linkedin.com/uas/oauth2/authorization?response_type=code&client_id=77zmh91vqkc0pg&redirect_uri=http://guilgul.com/english/prueba_linkedin.php&state=987654321&scope=rw_company_admin";

    ?>

    <p>

    <a href ="<?php echo($fullUrl) ?>" >Linkedin</a></h2>

 </p>

 <?php

}

else{

	print_r($user_timeline);

}

//print_r($user_profile);

echo "<br /><br /><br /><br />";

  // iterate over the user timeline

  foreach( $user_timeline as $item ){

     echo $item->user->displayName . ": " . $item->text . "<hr />";

  }

?>