Sendgrid邮件没有发送与wamp服务器php

Question

I'm using sengrid api to send mails and i installed curl and WAMP server. mail sttus code is 0 and body and header is empty. how to solve this issue.?

i tried php version 7.1 and 7.2 but it doesn't work

$email = new \SendGrid\Mail\Mail();
$email->setFrom("[e-mail]", $subject);
$email->setSubject($subject);
$email->addTo($receiver, $subject);
$email->addContent("text/plain", $body);
$email->addContent(
     "text/html", $body
);
$sendgrid = new \SendGrid('api key');
    try {
       $response = $sendgrid->send($email);
       $returnArr = [
                'code' => $response->statusCode(),
                'body' => $response->body()
       ];
           echo json_encode($returnArr);                                        
           print $response->statusCode() . "
";
           print_r($response->headers());
           print $response->body() . "
";
    } catch (Exception $e) {
      //echo 'Caught exception: ' . $e->getMessage() . "
";
    } /*end sending email*/
}