If you are trying to change a setting on your bed while away, your bed may have lost power or wifi connection.
If you bed should be powered on and connected, try the following steps:
You will need to have wifi or cellular enabled on your phone in order to communicate with your bed remotely.
See this article for help connecting to your bed: "I am not able to connect to my bed."
Visit Hue Support to learn how.
Restart your device, wait one minute, and try connecting again.