Fatal error: Uncaught Error: Interface "PHPMailer\PHPMailer\OAuthTokenProvider" not found in /var/lib/sites/site-1049/www/html/wp-includes/PHPMailer/OAuth.php:36
Stack trace:
#0 {main}
  thrown in /var/lib/sites/site-1049/www/html/wp-includes/PHPMailer/OAuth.php on line 36