TYPO3 Core

Controller of my Backend Module:

<?php

namespace TYPO3\CMS\PackageManager\Controller;

use TYPO3\CMS\Extbase\Mvc\Controller\ActionController;

class ListController extends ActionController
{
    public function indexAction()
    {
        $this->view->assignMultiple(
            [
                'installed' => [],
                'outdated' =>  [],
                'backendUserFilter' => 'All'
            ]
        );
    }
}

$this->view->assignMultiple triggers this notice when displayErrors is enabled:

Notice: Undefined index: allowedSubProperties in /var/www/html/typo3/public/typo3/sysext/core/Classes/MetaTag/AbstractMetaTagManager.php on line 298

Notice: Undefined index: allowedSubProperties in /var/www/html/typo3/public/typo3/sysext/core/Classes/MetaTag/AbstractMetaTagManager.php on line 298