This could happen if your devices are already registered in a different tado° Home. Depending on how you bought your devices, here’s what you need to do to proceed with the installation and start using your devices:
If you bought second-hand devices, you can register and use your tado° devices only when the previous owner removes the devices from their account. Please contact the previous owner and ask them to do so.
If you moved into a house with a tado° system already in place, please contact the previous owner of the devices and ask them to give you access to their account.