Fatal error: Uncaught Error: Class "PHPUnit\Framework\TestCase" not found in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\mailer\Test\TransportFactoryTestCase.php:32 Stack trace: #0 {main} thrown in D:\xampp\htdocs\pimcore\my-project\vendor\symfony\mailer\Test\TransportFactoryTestCase.php on line 32