Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Crypto\SMime" not found in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\mime\Crypto\SMimeSigner.php:20 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\cms_upgrade\vendor\symfony\mime\Crypto\SMimeSigner.php on line 20