This error means the mobile application doesn’t have the Thread network information needed to provision the devices.
In order to fix it:
Ensure the Thread Border Routers are up and running.
Connect your mobile phone to the Wi-Fi network the Thread Border Routers are connected to, and try again.
If the problem persists, or if your place has no Thread Border Routers anymore, you’ll need to remove your devices and set them up again:
- Remove the devices from your system
- Reset them manually
- Set them up again in the app
Follow this article for step-by-step instructions on how to remove and reset your devices.