Fatal error: Uncaught Error: Interface 'PHPMailer\PHPMailer\OAuthTokenProvider' not found in C:\apache\htdocs\PHP - MySQL - Javascript - CSS - HTML\PHPMailer\src\OAuth.php:36 Stack trace: #0 {main} thrown in C:\apache\htdocs\PHP - MySQL - Javascript - CSS - HTML\PHPMailer\src\OAuth.php on line 36