Fatal error: Uncaught Error: Class 'Orchestra\Testbench\TestCase' not found in C:\Apache24\htdocs\vendor.old\laravel\ui\tests\AuthBackend\RegistersUsersTest.php:17 Stack trace: #0 {main} thrown in C:\Apache24\htdocs\vendor.old\laravel\ui\tests\AuthBackend\RegistersUsersTest.php on line 17