Fatal error: Uncaught Error: Class "Symfony\Component\Mailer\Test\TransportFactoryTestCase" not found in C:\xampp\htdocs\astra-backoffice\vendor\symfony\mailer\Tests\Transport\Smtp\EsmtpTransportFactoryTest.php:23 Stack trace: #0 {main} thrown in C:\xampp\htdocs\astra-backoffice\vendor\symfony\mailer\Tests\Transport\Smtp\EsmtpTransportFactoryTest.php on line 23