This could result from multiple reasons, some possibilities are listed below.
- No bus is operating - Between 2 am and 5 am literally no buses are out running, including diesel. Wait till the first bus of the day is out and running (normally after 5 am). Or if extreme weather approaches, AT may suspend all buses till it is safe to do so, but do check AT Travel Alerts for confirmation.
- You have no internet connection - Unlikely if you can still see this text. You could do a speed test.
- Other reasons - Pull a issue here on GitHub and I will have a look. Attach as much information as you possibly can.