The Appdata also contains the wrong license tag, it has to be
<project_license>GPL-3.0+ AND AGPL-3.0+</project_license>
https://git.launchpad.net/kicad/tree/resources/linux/appdata/kicad.appdata.xml
https://www.freedesktop.org/software/appstream/docs/chap-Metadata.html#sect-Metadata-GenericComponent
The Appdata also contains the wrong license tag, it has to be
<project_ license> GPL-3.0+ AND AGPL-3. 0+</project_ license>
https:/ /git.launchpad. net/kicad/ tree/resources/ linux/appdata/ kicad.appdata. xml
https:/ /www.freedeskto p.org/software/ appstream/ docs/chap- Metadata. html#sect- Metadata- GenericComponen t