fix settings object

src/routes.php

@@ -23,7 +23,7 @@ $app->get('/registration', function (Request $request, Response $response, array
     }
     return $view->render($response, 'registration.html',
       [
-        'closed' => $this->settings['close_registration'],
+        'closed' => $this->get('settings')['close_registration'],
         'sitekey' => $recapsitekey
       ]);
 });