A namespace error on PayumController.php is generating FatalErrorExcepti...

A namespace error on PayumController.php is generating FatalErrorException: Class 'Illuminate\Routing\Controllers\Controller' not found when calling capture url

i.e.: Calling http://localhost:8000/payment/capture/Yo9Ww5-IfcNlc-vcuX876DJhHcd5Tr9ZBQdKy5mrnYs