Flatpak: no remote refs found similar to 'flathub'

Hardware
7

If you want to have user-level installs from Flathub instead of system-level, you can run

flatpak remote-add --user --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo

Then you should see an additional user option listed for flathub in the output of flatpak remotes.

$ flatpak remotes
Name          Options
flathub       user

Then you can use the --user flag with your installs as you were trying before, and it should work