Cannot start up after upgrade to Fedora 31

I’ve upgraded Silverblue to F31, but it cannot start up. I see the Fedora logo on the bottom and the black screen but the GDM never appears and eventually I get a black screen.

I’ve looked into journalctl -xe and found these lines:

-- Unità UNIT entrata con successo nello stato 'dead' (morto).
nov 18 09:54:34 localhost.localdomain gsd-power[1537]: gsd-power: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
nov 18 09:54:34 localhost.localdomain gsd-color[1549]: gsd-color: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
nov 18 09:54:34 localhost.localdomain gsd-media-keys[1571]: gsd-media-keys: Fatal IO error 11 (Resource temporarily unavailable) on X server :1024.
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Clipboard.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-shell[1377]: Connection to xwayland lost
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Clipboard.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Power.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Power.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Keyboard.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Keyboard.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.XSettings.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Color.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.XSettings.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.MediaKeys.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.Color.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.SettingsDaemon.MediaKeys.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain systemd[1331]: dbus-:1.2-org.freedesktop.portal.IBus@0.service: Succeeded.
-- Subject: Unità terminata
-- Defined-By: systemd
-- Support: https://lists.freedesktop.org/mailman/listinfo/systemd-devel
-- 
-- Unità UNIT entrata con successo nello stato 'dead' (morto).
nov 18 09:54:34 localhost.localdomain gsd-color[2021]: failed to connect to device: Failed to connect to missing device /org/freedesktop/ColorManager/devices/xrandr_Dell_Inc__DELL_U2415_08DXD4B20UGL_gdm_42
nov 18 09:54:34 localhost.localdomain gnome-session[1356]: gnome-session-binary[1356]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: WARNING: App 'org.gnome.Shell.desktop' exited with code 1
nov 18 09:54:34 localhost.localdomain gnome-session-binary[1356]: Unrecoverable failure in required component org.gnome.Shell.desktop
nov 18 09:54:34 localhost.localdomain systemd[1331]: pulseaudio.service: Succeeded.

Any idea of what might be wrong?