make routeTo access defensive
make routeTo access defensive

might have triggered https://sentry.io/foodsaving-worldwide/karrot/issues/870678961/

yunity/foodsaving-frontend,yunity/foodsaving-frontend,yunity/foodsaving-frontend,yunity/karrot-frontend,yunity/karrot-frontend,yunity/foodsaving-frontend,yunity/karrot-frontend,yunity/karrot-frontend