Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Crypto\SMime" not found in /srv/www/sites/public/starter-cms/vendor/symfony/mime/Crypto/SMimeSigner.php:20 Stack trace: #0 {main} thrown in /srv/www/sites/public/starter-cms/vendor/symfony/mime/Crypto/SMimeSigner.php on line 20