Fatal error: Uncaught Error: Class 'Stevenmaguire\OAuth2\Client\Provider\Microsoft' not found in C:\xampp7\htdocs\edgpens\extension\PHPMailer-master\get_oauth_token.php:112 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\extension\PHPMailer-master\get_oauth_token.php on line 112