Fatal error: Uncaught Error: Interface 'PHPMailer\PHPMailer\OAuthTokenProvider' not found in /var/www/clients/client0/web9/web/wp-includes/PHPMailer/OAuth.php:36 Stack trace: #0 {main} thrown in /var/www/clients/client0/web9/web/wp-includes/PHPMailer/OAuth.php on line 36