We have improved our error handling so you should never see the error anymore on the calendar page now. If there are connectivity issues, we now display an error popup, asking you to either:
- retry: the app will attempt to refresh the page again
- cancel: the app will stay at current state, not refreshing the page

Great thank you! This will be more graciously handled when we release our 'error handling optimization' task.
Connectivity outage or server response failure will lead to errors that the App needs to handle - we will simply display a human friendly error message, with a button to refresh the page.

I haven't been able to reproduce. I was in fact having connectivity issues around the time of the error, so that may have been the issue.