Что не так с кодом?

Use PHPMailer\PHPMailer\PHPMailer;
use PHPMailer\PHPMailer\SMTP;
use PHPMailer\PHPMailer\Exception;

require 'PHPMailer/src/Exception.php';
require 'PHPMailer/src/PHPMailer.php';
require 'PHPMailer/src/SMTP.php';
....
//Enable SMTP debugging.
$mail->SMTPDebug = 3;
//Set PHPMailer to use SMTP.
$mail->isSMTP();
//Set SMTP host name
$mail->Host = "smtp.gmail.com";
//Set this to true if SMTP host requires authentication to send email
$mail->SMTPAuth = true;

//If SMTP requires TLS encryption then set it
$mail->SMTPSecure = "tls";

//Set TCP port to connect to
$mail->Port = 587;
//CharSet
$mail->CharSet = 'UTF-8';

//Provide username and password
$mail->Username = "mail7@gmail.com";
$mail->Password = "pass";
//From
$mail->setFrom('mail7@gmail.com');
$mail->FromName = "pass";
//Reply
$mail->addReplyTo("mail7@gmail.com", "Reply");
//foreach($subscribed_db as $news_mail){
// $mail->addBCC($news_mail.";");
// }
//$mail->$to='';
$mail->Subject = "news";
$mail->Body = "name";

//Send HTML or Plain Text
$mail->isHTML(true);