Fatal error: Uncaught Error: Call to a member function getNumber() on null in /var/www/html/custom/plugins/MdhProductConfigurator/Subscriber/FrontendSubscriber.php:204 Stack trace: #0 /var/www/html/engine/Library/Enlight/Event/Handler/Default.php(90): MdhProductConfigurator\Subscriber\FrontendSubscriber->onFrontendListing(Object(Enlight_Controller_ActionEventArgs)) #1 /var/www/html/engine/Library/Enlight/Event/EventManager.php(207): Enlight_Event_Handler_Default->execute(Object(Enlight_Controller_ActionEventArgs)) #2 /var/www/html/engine/Library/Enlight/Controller/Action.php(203): Enlight_Event_EventManager->notify('Enlight_Control...', Object(Enlight_Controller_ActionEventArgs)) #3 /var/www/html/engine/Library/Enlight/Controller/Dispatcher/Default.php(467): Enlight_Controller_Action->dispatch('indexAction') #4 /var/www/html/engine/Library/Enlight/Controller/Front.php(226): Enlight_Controller_Dispatcher_Default->dispatch(Object(Enlight_Controller_Request_RequestHttp), Object(Enlight_Controller_Response_ResponseHttp)) #5 / in /var/www/html/custom/plugins/MdhProductConfigurator/Subscriber/FrontendSubscriber.php on line 204