The value for the SHELL variable was not found the /etc/shells file

This incident has been reported.
gnome-settings-daemon: Fatal IO error 11 (Risorsa temporaneamente non disponibile) on X server :0.0.
Avviso del window manager: Errore fatale di IO 11 (Risorsa temporaneamente non disponibile) relativo al display «:0.0».
gnome-session: Fatal IO error 11 (Risorsa temporaneamente non disponibile) on X server :0.0.
gdm-simple-greeter[9886]: WARNING: Failed to send session response Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.
gnome-power-manager: Fatal IO error 11 (Risorsa temporaneamente non disponibile) on X server :0.0.
gdm-simple-greeter: Fatal IO error 111 (Connessione rifiutata) on X server :0.0.