Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Header\AbstractHeader" not found in /home/awapp/api.americanholdings.lk/sample/vendor/symfony/mime/Header/UnstructuredHeader.php:19 Stack trace: #0 {main} thrown in /home/awapp/api.americanholdings.lk/sample/vendor/symfony/mime/Header/UnstructuredHeader.php on line 19