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