Comment #2 is the only thing required to fix Lubuntu 23.10, but a future version of xdg-desktop-portal will also require this to be done (that future version won't happen for Ubuntu 23.10).
Please have something (maybe xdg-desktop-portal-lxqt would work, like how xdg-desktop-portal-kde does it)
install this file
/usr/share/xdg-desktop-portals/lxqt-portal.conf with this content:
[preferred]
default=lxqt
Comment #2 is the only thing required to fix Lubuntu 23.10, but a future version of xdg-desktop-portal will also require this to be done (that future version won't happen for Ubuntu 23.10).
Please have something (maybe xdg-desktop- portal- lxqt would work, like how xdg-desktop- portal- kde does it)
install this file
/usr/share/ xdg-desktop- portals/ lxqt-portal. conf with this content:
[preferred]
default=lxqt