`flatpak` apps in #PopOS are run inside a protective sandbox environment with a fancy `chroot`-like **mount namespace**. To spawn other apps from a `flatpak` app, you therefore need to use a special mechanism to break out of that environment. For running other `flatpak` apps, e.g., but want to keep using the mounted file system, use the following command: ```bash /bin/flatpak-spawn --host /bin/flatpak run --filesystem=xdg-config/joplin-desktop org.gnome.gedit ``` If you want to spawn "normal" apps and binaries, use: ```bash /usr/bin/flatpak-spawn --host /usr/bin/typora ``` E.g., this affects the setup of Joplin on Pop_OS!, which is installed as a `flatpak`.