Ошибки сетевых дисплеев GNOME

Я получаю следующие ошибки при запуске GNOME Network Displays. Будем признательны за любую помощь в устранении неполадок. Я запускаю новую установку Ubuntu 20.04.

Gtk-Message: 18:20:32.421: Failed to load module "canberra-gtk-module"
Gtk-Message: 18:20:32.422: Failed to load module "canberra-gtk-module"

** (gnome-network-displays:2): WARNING **: 18:20:33.036: Error calling DBus method during Screencast portal initialization: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop
** (gnome-network-displays:2): WARNING **: 18:20:33.036: Error initing screencast portal: GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface “org.freedesktop.portal.ScreenCast” on object at path /org/freedesktop/portal/desktop
** (gnome-network-displays:2): WARNING **: 18:20:33.036: Screencasting portal is unavailable! It is required to select the monitor to stream!
** (gnome-network-displays:2): WARNING **: 18:20:33.036: Falling back to X11! You need to fix your setup to avoid issues (XDG Portals and/or mutter screencasting support)!
** (gnome-network-displays:2): WARNING **: 18:20:53.666: Could not start P2P find: GDBus.Error:org.freedesktop.NetworkManager.Device.NotActive: WPA Supplicant management interface is currently unavailable.