Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\Project\laravel-12x-tutorial\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php:21 Stack trace: #0 {main} thrown in D:\Project\laravel-12x-tutorial\vendor\symfony\mailer\Test\AbstractTransportFactoryTestCase.php on line 21