Fatal error: Uncaught Error: Interface "PHPMailer\PHPMailer\OAuthTokenProvider" not found in D:\WEB\htdocs\Namdruk\wp-includes\PHPMailer\OAuth.php:36 Stack trace: #0 {main} thrown in D:\WEB\htdocs\Namdruk\wp-includes\PHPMailer\OAuth.php on line 36