Fatal error: Uncaught TypeError: Pimcore\Model\DataObject\AbstractObject::getById(): Argument #1 ($id) must be of type string|int, null given, called in /var/www/html/bundles/AppBundle/Controller/MagazinController.php on line 460 and defined in /var/www/html/vendor/pimcore/pimcore/models/DataObject/AbstractObject.php:194 Stack trace: #0 /var/www/html/bundles/AppBundle/Controller/MagazinController.php(460): Pimcore\Model\DataObject\AbstractObject::getById(NULL) #1 [internal function]: AppBundle\Controller\MagazinController->AppBundle\Controller\{closure}(Object(Pimcore\Model\Document\Editable\Relation)) #2 /var/www/html/bundles/AppBundle/Controller/MagazinController.php(457): array_map(Object(Closure), Array) #3 /var/www/html/bundles/AppBundle/Controller/MagazinController.php(120): AppBundle\Controller\MagazinController->getHighlightedArticles(Object(Pimcore\Bundle\PersonalizationBundle\Model\Document\Page)) #4 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(181): AppBundle\Controller\MagazinController->magazinOverviewAction(Object(Symfony\Component\HttpFoundation\Request), 'autor', 'robert-hoffmann') #5 /var/www/html/vendor/symfony/http-kernel/HttpKernel.php(76): Symfony\Component\HttpKernel\HttpKernel->handleRaw(Object(Symfony\Component\HttpFoundation\Request), 1) #6 /var/www/html/vendor/symfony/http-kernel/Kernel.php(197): Symfony\Component\HttpKernel\HttpKernel->handle(Object(Symfony\Component\HttpFoundation\Request), 1, true) #7 /var/www/html/public/index.php(44): Symfony\Component\HttpKernel\Kernel->handle(Object(Symfony\Component\HttpFoundation\Request)) #8 {main} thrown in /var/www/html/vendor/pimcore/pimcore/models/DataObject/AbstractObject.php on line 194