สอบถามเรื่อง phpmailer smtp gmail หน่อยครับ ส่งเมล์แล้ว ขึ้นว่า SMTP connect() failed

$mail = new PHPMailer;

$mail->IsHTML(true);
$mail->IsSMTP();
$mail->SMTPAuth = true;
$mail->Host = 'smtp.gmail.com';
$mail->SMTPSecure = 'tls';
$mail->Port = 587;
$mail->Username = "[email protected]";
$mail->Password = "xx";
$mail->From = "[email protected]";

$mail->FromName = "noreply@xx";
$mail->Subject = "TEST Completed";
$mail->Body = $body;

$mail->AddAddress($email_send, "noreply@xx");
$mail->send();

if (!$mail->Send()) {
    echo 'Message could not be sent.';
    echo 'Mailer Error: ' . $mail->ErrorInfo;
} else {


    ?>
    <script language="javascript" type="text/javascript">
        alert('Completed');
        window.location = 'index.php';
    </script>
    <?php
    // echo 'Message has been sent';
}