Catchable fatal error: Argument 1 passed to Axon\ProductBundle\Entity\ProductRepository::findAllByCategoryQuery() must be an instance of Axon\ProductBundle\Entity\Category, null given, called in /usr/home/nousdepalau.com/src/Axon/FrontendBundle/Controller/DefaultController.php on line 55 and defined in /usr/home/nousdepalau.com/src/Axon/ProductBundle/Entity/ProductRepository.php on line 42