Ubuntu 26.04 にTenacityをインストールしたときのメモ
$ FLATPAK_FORCE_TEXT_AUTH=1 flatpak remote-add –if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
$ flatpak remote-add –user –if-not-exists flathub https://dl.flathub.org/repo/flathub.flatpakrepo
$ sudo killall flatpak
$ sudo systemctl restart flatpak-system-helper
PCを再起動 (ログアウトだけで充分だと思う)
$ flatpak install flathub org.tenacityaudio.Tenacity