Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Transport\AbstractTransport" not found in D:\programs\xampp\htdocs\blog\vendor\symfony\mailer\Transport\NullTransport.php:21 Stack trace: #0 {main} thrown in D:\programs\xampp\htdocs\blog\vendor\symfony\mailer\Transport\NullTransport.php on line 21