Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Crypto\SMime" not found in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\mime\Crypto\SMimeEncrypter.php:20 Stack trace: #0 {main} thrown in C:\AppServ\Apache\2.4.58\htdocs\sets\vendor\symfony\mime\Crypto\SMimeEncrypter.php on line 20