php - File attachment from form with phpMailer

one text

My form

     <form class="c-form" enctype="multipart/form-data" action="http://www.test15.xyz/mail.php" method="post">
            <div class="form-cont">
....
                <div class="call-field call-field_file">
                    <div class="file-holder"><span class="f-quant"></span></div>
                    <input type="file" name="file" class="call-input">
                </div>
....
                <div class="form-add">
                    <div class="alert-text ital red">Not all required fields are filled</div>
                    <button type="submit" class="button submit">Submit</button>                 
                </div>
            </div>
        </form>

Form.php code


require 'lib/src/PHPMailer.php';
require 'lib/src/SMTP.php';
require 'lib/src/Exception.php';

if (!empty($_POST)){

    $email = htmlspecialchars(trim($_POST['email']));
    
    $name = htmlspecialchars(trim($_POST['name']));
    
    isset($_POST['surname']) ? $surname = htmlspecialchars(trim($_POST['surname'])) : $surname = 'Surname';
    
    isset($_POST['phone']) ? $phone = htmlspecialchars(trim($_POST['phone'])) : $phone = 'tel';
    
    $sub = htmlspecialchars(trim($_POST["subject"]));

    $message = htmlspecialchars(trim($_POST['message']));
    
}

    if ( !empty( $_FILES['file']['tmp_name'] ) && $_FILES['file']['error'] == 0 ) {
    $filepath = $_FILES['file']['tmp_name'];
    $filename = $_FILES['file']['name'];
    } else {
    $filepath = '';
    $filename = '';
    }

    use PHPMailer\PHPMailer\PHPMailer;
    
    $mail = new PHPMailer;
    $mail->CharSet = 'UTF-8';
    $mail->setFrom($email, $name); 
    $mail->addAddress('condom@test15.xyz'); 
    $mail->addAddress('blagorad@list.ru');
    $mail->Subject = $sub;
    $mail->msgHTML("<html><body>
                <p><php> $message <?> </p>
                </html></body>");
    $mail->addAttachment($filepath, $filename);

    
    $mail->send();

The email sends the body correctly, but without the Attachment. Php.ini file_uploads = On. CMS Wordpress. Are there any server settings I need? I don`t use SMTP, auth, passwords etc. I want just my attached file to be uploaded to mail. File without form like that $mail->addAttachment('readme.html', 'readme file'); sends good.

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