Fatal error: Uncaught TypeError: Argument 1 passed to Frontend\FrontendModule\Managers\HarkenArticleManager::getArticleIdsFromRelatedCatalog() must be of the type integer, null given, called in /var/www/harkenindustrial/src/Frontend/FrontendModule/Controllers/CaseStudiesController.php on line 75 and defined in /var/www/harkenindustrial/src/Frontend/FrontendModule/Managers/HarkenArticleManager.php:60 Stack trace: #0 /var/www/harkenindustrial/src/Frontend/FrontendModule/Controllers/CaseStudiesController.php(75): Frontend\FrontendModule\Managers\HarkenArticleManager->getArticleIdsFromRelatedCatalog(NULL, Array) #1 [internal function]: Frontend\FrontendModule\Controllers\CaseStudiesController->listAction('case-studies') #2 /var/www/harkenindustrial/src/Core/Lavarel/Dispatcher/Dispatcher.php(28): call_user_func_array(Array, Array) #3 /var/www/harkenindustrial/src/Core/Lavarel/Application/Application.php(256): Lavarel\Dispatcher\Dispatcher->dispatchRequest(Object(Symfony\Component\HttpFoundation\Request)) #4 /var/www/harkenindu in /var/www/harkenindustrial/src/Frontend/FrontendModule/Managers/HarkenArticleManager.php on line 60