SwiftMailer不工作

I am using GMAIL smtp to send mail using the SwiftMailer package, however it is not working. I installed the files and placed the lib folder onto the server as instructed. Here is my php code:

require_once "lib/swift_required.php";

$transport = Swift_SmtpTransport::newInstance('smtp.gmail.com', 465, 'ssl')
->setUsername('clubbedinapp@gmail.com')
->setPassword('password')
;

$mailer = Swift_Mailer::newInstance($transport);

$message = Swift_Message::newInstance('Wonderful Subject')
->setFrom(array('clubbedinapp@gmail.com' => 'Evaluaciones'))
->setTo(array('nishil.shah17@gmail.com'=> 'A name'))
->setBody('Test Message Body')
;

$result = $mailer->send($message);

echo $result;

I am getting multiple errors like so:

enter image description here