Fatal error: Uncaught Laminas\Diactoros\Exception\InvalidArgumentException: Uri provided to Laminas\Diactoros\Response\RedirectResponse MUST be a string or Psr\Http\Message\UriInterface instance; received "NULL" in /var/www/vhosts/concretewave.de/httpdocs/includes/vendor/laminas/laminas-diactoros/src/Response/RedirectResponse.php:36
Stack trace:
#0 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Router/Controller/ProductListController.php(200): Laminas\Diactoros\Response\RedirectResponse->__construct()
#1 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Router/Controller/ProductListController.php(90): JTL\Router\Controller\ProductListController->checkProductRedirect()
#2 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Router/Controller/CharacteristicValueController.php(76): JTL\Router\Controller\ProductListController->getResponse()
#3 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Router/Controller/DefaultController.php(121): JTL\Router\Controller\CharacteristicValueController->getResponse()
#4 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Router/Router.php(684): JTL\Router\Controller\DefaultController->getResponse()
#5 /var/www/vhosts/concretewave.de/httpdocs/includes/src/Shop.php(472): JTL\Router\Router->dispatch()
#6 /var/www/vhosts/concretewave.de/httpdocs/index.php(7): JTL\Shop::dispatch()
#7 {main}
  thrown in /var/www/vhosts/concretewave.de/httpdocs/includes/vendor/laminas/laminas-diactoros/src/Response/RedirectResponse.php on line 36