Fatal error: Uncaught Error: Failed opening required 'vendor/autoload.php' (include_path='C:\xampp\php\PEAR') in C:\xampp\htdocs\pagina\Lib\PHPMailer\PHPMailer-master\get_oauth_token.php:18 Stack trace: #0 {main} thrown in C:\xampp\htdocs\pagina\Lib\PHPMailer\PHPMailer-master\get_oauth_token.php on line 18