Internet connection not working after updating nvidia drivers on kubuntu 21.10

I recently did a fresh install of Kubuntu 21.10 and everything has worked fine for weeks. Yesterday the second monitor suddenly was not recognized anymore, so I tried to update the nvidia drivers. It turned out that the monitor was just not "enabled" in the display configuration panel in system settings (it was enabled first, but then it decided to disable itself for unknown reasons), however the display is now working, but I cannot access the internet anymore. The only thing I did was to update the recommended nvidia drivers with sudo ubuntu-drivers install, but I don't see how this could have broken my access to the internet. I am using wired connection, and the network panel says I am connected. But I cannot navigate in Safari or download updates. Please consider I am a relatively newbie in Linux and I have no clue what information to put here to help you better understand the problem. I cannot find similar problems in the web. The only thing that I have tried so far is this (as suggested here: No internet access after upgrading to lubuntu 21.04):

sudo rm -rf /etc/resolv.conf
sudo ln -s /run/systemd/resolve/resolv.conf /etc/resolv.conf
sudo service systemd-resolved restart

But it did not solved the problem. Many thanks to anyone willing to help.

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