I booted up my computer & was blocked from the internet. I was able to log onto my router and firewall. I had a feeling it was the ProtonVPN app, so I uninstalled it. No success, so I did a Refresh on my OS. No success. In desperation, I looked up possible fixes on my phone and found one that works. So thought I'd share. # sudo nmcli connection delete pvpn-killswitch # sudo nmcli connection delete pvpn-ipv6leak Reboot after. Success! In the end it was ProtonVPN even after deleting the app.