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Attempted to load class "Exception" from namespace "MGraphics\Application\Store\FrontendBundle\Controller". Did you forget a "use" statement for e.g. "JMS\Serializer\Exception\Exception", "Gedmo\Exception", "Assetic\Exception\Exception", "Symfony\Component\Security\Acl\Exception\Exception", "Symfony\Component\Config\Definition\Exception\Exception" or "Symfony\Component\Serializer\Exception\Exception"?