Why can I not control my Truma appliances remotely although my Truma iNet Box is set up correctly?

If an obligatory firmware update is available on the server, remote control is blocked until you complete the update. If the update is not compatible with the installed version of the Truma App, you have to first update the App. An update is possible only when your device is connected to the Internet and can also communicate with the iNet Box via Bluetooth.