Fatal error: Uncaught Error: Class "Symfony\Component\Mime\Header\AbstractHeader" not found in /www/wwwroot/base.code.treexhd.me/VSCode/laravel/covid/vendor/symfony/mime/Header/UnstructuredHeader.php:19 Stack trace: #0 {main} thrown in /www/wwwroot/base.code.treexhd.me/VSCode/laravel/covid/vendor/symfony/mime/Header/UnstructuredHeader.php on line 19