Fatal error: Uncaught Error: Class 'League\OAuth2\Client\Provider\Google' not found in C:\xampp7\htdocs\edgpens\extension\PHPMailer-master\get_oauth_token.php:101 Stack trace: #0 {main} thrown in C:\xampp7\htdocs\edgpens\extension\PHPMailer-master\get_oauth_token.php on line 101