You must use a desktop compatible with an XDG backend that supports the "App Chooser Portal": https://wiki.archlinux.org/title/XDG_Desktop_Portal#List_of_backends_and_interfaces
These have been listed as optional dependencies. You must install the XDG backend to suit your DE.
If you are running i3, see comment by cprn: https://aur.archlinux.org/packages/nexusmods-app-bin#comment-1016570
Pinned Comments
Abzie commented on 2025-03-22 23:05 (UTC)
You must use a desktop compatible with an XDG backend that supports the "App Chooser Portal": https://wiki.archlinux.org/title/XDG_Desktop_Portal#List_of_backends_and_interfaces
These have been listed as optional dependencies. You must install the XDG backend to suit your DE.
If you are running i3, see comment by cprn: https://aur.archlinux.org/packages/nexusmods-app-bin#comment-1016570