Multiple errors in TYPO3-log

[juergenfurrer]

PHP 8+ does not like undefined variables ;)

in DownloadController->listAction()
$downloadUrl = null; $this->view->assign('downloadUrl' , $downloadUrl);
In fact, this could be removed, it is always empty...

In AbstractController->initializeAction()
These keys are not set in the settings-array

    if (!isset($this->settings['controllers'])) {
        $this->settings['controllers'] = [];
    }
    $this->controllerSettings = $this->settings['controllers'][$this->request->getControllerName()];

    if (!isset($this->settings['actions'])) {
        $this->controllerSettings['actions'] = [];
    }
    $this->actionSettings = $this->controllerSettings['actions'][$this->request->getControllerActionName()];