Es ist ein Fehler aufgetreten.
The _controller value "AppBundle:Default:index" maps to a "AppBundle\Controller\DefaultController" class, but this class was not found. Create this class or check the spelling of the class and its namespace.
The _controller value "AppBundle:Default:index" maps to a "AppBundle\Controller\DefaultController" class, but this class was not found. Create this class or check the spelling of the class and its namespace.