Fatal error: Uncaught InvalidArgumentException: Cannot redirect to an empty URL. in /homepages/18/d233087118/htdocs/REDWEB/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/RedirectResponse.php:86 Stack trace: #0 /homepages/18/d233087118/htdocs/REDWEB/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/RedirectResponse.php(39): Symfony\Component\HttpFoundation\RedirectResponse->setTargetUrl(NULL) #1 /homepages/18/d233087118/htdocs/REDWEB/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Controller/ControllerTrait.php(121): Symfony\Component\HttpFoundation\RedirectResponse->__construct(NULL, 302) #2 /homepages/18/d233087118/htdocs/REDWEB/src/AppBundle/Controller/dershopkorbController.php(154): Symfony\Bundle\FrameworkBundle\Controller\Controller->redirect(NULL) #3 /homepages/18/d233087118/htdocs/REDWEB/vendor/symfony/symfony/src/Symfony/Component/HttpKernel/HttpKernel.php(151): AppBundle\Controller\dershopkorbController->mmdeaddkorbAction('29', Object(Symfony\Component\HttpFoundation\Request)) #4 in /homepages/18/d233087118/htdocs/REDWEB/app/Resources/views/INSERT/ERROR PAGE/error.html.twig on line 36