The user is no more guest as said by Micha B. So to unlock the guest session go to a terminal, use the command "users" to get the name of guest in the shape guest-######. Then "sudo passwd guest-######" to affect a password.
The user is no more guest as said by Micha B. So to unlock the guest session go to a terminal, use the command "users" to get the name of guest in the shape guest-######. Then "sudo passwd guest-######" to affect a password.