Flatpak com erro ao instalar programas

root@FreeSouls:/home/jowfb# flatpak install flathub br.com.jeanhertel.adriconf

Note that the directory

‘/root/.local/share/flatpak/exports/share’

is not in the search path set by the XDG_DATA_DIRS environment variable, so
applications installed by Flatpak may not appear on your desktop until the
session is restarted.

Looking for matches…
erro: No remote refs found similar to ‘flathub’

obs sempre com o mesmo erro…ja tentei reiniciar…

Você fez o comando

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

?