Clearly something is wrong with the site. Everything else seems to be working fine on my machine thus far. Gnome Software, update & the included firefox ESR
It’s fixed sorry. although probably didn’t fix until after response. If you’re on a tether that might have a proxy then what you need to do is add -E after sudo before apt on a lot of tasks. Such a foreign thing for someone who has mostly used windows and programs do all the grunt work most of the time. So example for brave I did
sudo -E apt install curl
and this works for all sudo apts. it might work for the curl lines too cant remember. its not needed for flatpak commands that seems to work fine.