@RJW1995 , Welcome to the community!
We have made the switch to IPv4 so that you can set your modem to bridge mode, which is 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.
Try it again afterwards.
Greetings
Daniele