Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Test\AbstractTransportFactoryTestCase" not found in D:\xampp\htdocs\lux_PHP\vendor\symfony\mailer\Test\TransportFactoryTestCase.php:29 Stack trace: #0 {main} thrown in D:\xampp\htdocs\lux_PHP\vendor\symfony\mailer\Test\TransportFactoryTestCase.php on line 29