This error message is shown not to alert users, but rather make users report these issues to the distributor, as this particular issue means the distributor has a mistake in their metadata somewhere.
In this case it's not Ubuntu's fault directly, but rather GNOME Software injecting invalid metadata.
This is fixed upstream with commit https://gitlab.gnome.org/GNOME/gnome-software/commit/7c1620990b6361fac370b76c9828f8f77ff77a72 which should land in the next Ubuntu release naturally (but may be cherry-picked to make this issue go away even sooner).
This error message is shown not to alert users, but rather make users report these issues to the distributor, as this particular issue means the distributor has a mistake in their metadata somewhere. /gitlab. gnome.org/ GNOME/gnome- software/ commit/ 7c1620990b6361f ac370b76c9828f8 f77ff77a72 which should land in the next Ubuntu release naturally (but may be cherry-picked to make this issue go away even sooner).
In this case it's not Ubuntu's fault directly, but rather GNOME Software injecting invalid metadata.
This is fixed upstream with commit https:/