Fatal error: Uncaught Error: Class "Orchestra\Testbench\TestCase" not found in D:\Application\www\CPDB\vendor\laravel\ui\tests\AuthBackend\RegistersUsersTest.php:17 Stack trace: #0 {main} thrown in D:\Application\www\CPDB\vendor\laravel\ui\tests\AuthBackend\RegistersUsersTest.php on line 17