Fatal error: Uncaught exception 'InvalidArgumentException' with message 'Cannot redirect to an empty URL.' in /www/referencje.gtlgrupa.website.pl/vendor/symfony/symfony/src/Symfony/Component/HttpFoundation/RedirectResponse.php:41 Stack trace: #0 /www/referencje.gtlgrupa.website.pl/vendor/symfony/symfony/src/Symfony/Bundle/FrameworkBundle/Controller/Controller.php(82): Symfony\Component\HttpFoundation\RedirectResponse->__construct(NULL, 302) #1 /www/referencje.gtlgrupa.website.pl/src/Wolpap/Bundle/AdminBundle/Controller/RefController.php(344): Symfony\Bundle\FrameworkBundle\Controller\Controller->redirect(NULL) #2 [internal function]: Wolpap\Bundle\AdminBundle\Controller\RefController->specialRefAction(Object(Symfony\Component\HttpFoundation\Request), '6870') #3 /www/referencje.gtlgrupa.website.pl/app/bootstrap.php.cache(3039): call_user_func_array(Array, Array) #4 /www/referencje.gtlgrupa.website.pl/app/bootstrap.php.cache(3001): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Re in /www/referencje.gtlgrupa.website.pl/vendor/symfony/symfony/src/Symfony/Bundle/TwigBundle/Loader/FilesystemLoader.php on line 91