Sorry for the inconvenience, this is due to the app not being able to poll OpenWeatherMaps for data. To explain further:
We had to recently switch the weather source for our weather service from WUnderground to OpenWeatherMaps due to the service being shutdown. During this change, we decided it would be better if we made a single account that we are responsible for on OpenWeatherMaps and using our single API key for all users. This makes it easier for the end-user so they don’t need to register an account on OpenWeatherMaps and generate an API key. The downside to this is we cannot give this key out otherwise our expenses will increase uncontrollably.
The app does not currently know this and shows the prior error messages. I will ensure that is fixed in the next update.
Thank you for your understanding.