Fatal error: Uncaught Error: Class 'Symfony\Component\Mime\Header\AbstractHeader' not found in /Users/caiosilva/Sites/Laravel-test/vendor/symfony/mime/Header/UnstructuredHeader.php:19 Stack trace: #0 {main} thrown in /Users/caiosilva/Sites/Laravel-test/vendor/symfony/mime/Header/UnstructuredHeader.php on line 19