Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Header\AbstractHeader" not found in D:\NTG_App\www\TIL_Local_Export_Follow_UP\vendor\symfony\mime\Header\IdentificationHeader.php:22 Stack trace: #0 {main} thrown in D:\NTG_App\www\TIL_Local_Export_Follow_UP\vendor\symfony\mime\Header\IdentificationHeader.php on line 22