AppOfflineError Connection to server failed

Anvil Q&A
3

You can add something like this to your startup code (assuming you haven’t already set up custom error handling, in which case you’d need to modify that code):

def error_handler(err):
  if isinstance(err, anvil.server.AppOfflineError):
    handle_server_connection_error(err)
  else:
    raise err

def handle_server_connection_error(err):
  Notification("Server connection error. If something is not working as expected, please refresh the page.",
                      style="warning", timeout=5).show()
  print(repr(err))

set_default_error_handling(error_handler)