8108572237 Welcome to the community!
We have just switched your modem to IPv4. Please check in a few minutes after your modem has restarted whether you can access the internal area. You can find instructions here.
However, I see that you have a Netgear router. In this case, I recommend setting it to bridge mode so that the Sunrise modem is just a modem without a firewall and your router manages everything related to the network. Instructions for bridge mode can be found here.
Greetings
Daniele