I'm not sure you made the change effective. Your Settings.php still has 'Hiltenfingen|https://www.wunderground.com/weather/de/hiltenfingen', //Hiltenfingen, Deutschland
and needs to have 'Hiltenfingen|https://www.wunderground.com/weather/de/hiltenfingen/48.1535502%2C10.6805879', //Hiltenfingen, Deutschland
That is why the error persists.