Hello,
unfortunately right now on Sonoma, Real Site feature is partially disabled. We have received reports from small but significant number of users, that this feature was preventing them from accessing Internet especially when connecting via Ethernet. We are in contact with Apple, analysing the problem and preparing fixes. The situation is complicated by the fact that we were not able to reproduce it on any of our devices.
We apologise for this, however there currently is no better solution.
Kind regards,
Ondrej Kolacek