> Your Flatpak version does not support the expose-pids flag,
> which means that Chromium is unable to run. This generally
> happens if your distro's bubblewrap installation is setuid
> instead of using user namespaces.
Also reported by another user in the [[ https://discuss.getsol.us/d/5905-cant-run-chromium-flatpak | forum discussion ]]
There the RCA AND proposed solution by @Harvey is:
> Can confirm bubblewrap is setuid
> Other distros seem to have --with-priv-mode=none or ship two packages to cover both options.