Extbase Error 404

extbase_error404

use TYPO3\CMS\Frontend\Controller\ErrorController;
use TYPO3\CMS\Core\Http\ImmediateResponseException;
use TYPO3\CMS\Frontend\Page\PageAccessFailureReasons;
use TYPO3\CMS\Extbase\Mvc\RequestInterface;

    /**
     * processRequest
     *
     * @param  \TYPO3\CMS\Extbase\Mvc\RequestInterface $request
     * @throws \Exception|\TYPO3\CMS\Extbase\Property\Exception
     */
    public function processRequest(RequestInterface $request): ResponseInterface
    {
        try {
            return parent::processRequest($request, $response);
        }
        catch(\TYPO3\CMS\Extbase\Property\Exception\TargetNotFoundException $e) {
            if ($e instanceof \TYPO3\CMS\Extbase\Property\Exception\TargetNotFoundException) {
                $response = GeneralUtility::makeInstance(ErrorController::class)->pageNotFoundAction(
                    $GLOBALS['TYPO3_REQUEST'],
                    '404 - Not Found',
                    ['code' => PageAccessFailureReasons::PAGE_NOT_FOUND]
                );
                throw new ImmediateResponseException($response);
            } else {
                throw $e;
            }
        }
    }