swissandrew If you have activated the bridge mode, you have to release the port 2002 for the internal IP of the UPC TV box, so that the box can communicate with our server. It is also important that the UPC TV Box is connected directly via LAN cable from your router. No other devices in between like hub, switches, powerline adapters, etc.
We have made the changeover to IPv4, which will be completed in 30 minutes. Restart your modem afterwards. If you have problems, reset your modem. Press the reset button on the back of the modem with a pointed object for at least 25 seconds. Then please try again.
Greetings
Daniele