Problem with PHP mailer file?

I have downloaded the zip file and put it in the vendor folder as on the video but my suggest page has now stopped working, not sure if this file is out of date which could be the cause of the problem?? Not sure if it could be an upper case vs lower case problem?

<?php //Import PHPMailer classes into the global namespace use PHPMailer\PHPMailer\PHPMailer; require 'vendor/phpmailer/src/PHPMailer.php'; require 'vendopr/phpmailer/src/Exception.php';

if ($_SERVER["REQUEST_METHOD"] == "POST") { $name = trim(filter_input(INPUT_POST,"name",FILTER_SANITIZE_STRING)); $email = trim(filter_input(INPUT_POST,"email",FILTER_SANITIZE_EMAIL)); $details = trim(filter_input(INPUT_POST,"details",FILTER_SANITIZE_SPECIAL_CHARS));

if($name == "" OR $email == "" OR $details == "") { echo "Please fill in the required fields: Name, Email and Details"; exit; } if ($POST["address"] != "") { echo "Bad form input"; exit;