This suddenly happened to me when I changed the channel on my #1 Philips Hue Bridge. I have four of them, each integrated with Hubitat through a separate instance of the Hue Bridge Integration.
Now, with the #1 instance, I'm getting this error message: "The current Hue username is invalid. Please press the button on your Hue Bridge to relink." Pressing the button does nothing.
All devices that were previously controlled by Hubitat vis this bridge are now unresponsive, except for in the Hue App itself.
How can I save this situation without having to reinstall all the devices and all the automations they are involved in which this Hue bridge controls in Hubitat?