Fatal error: Declaration of PrestaShopBundle\Event\Dispatcher\NullDispatcher::getListeners($eventName = NULL) must be compatible with Symfony\Component\EventDispatcher\EventDispatcherInterface::getListeners(?string $eventName = NULL): array in /home/megadiscount/cartouches-fr.com/src/PrestaShopBundle/Event/Dispatcher/NullDispatcher.php on line 60