(lightdm-gtk-greeter:1791): GLib-CRITICAL **: g_shell_parse_argv: assertion 'command_line != NULL' failed

** (lightdm-gtk-greeter:1791): WARNING **: Failed to open sessions directory: Error opening directory '/usr/share/lightdm/sessions': No such file or directory

** (lightdm-gtk-greeter:1791): WARNING **: Failed to open sessions directory: Error opening directory '/usr/share/lightdm/remote-sessions': No such file or directory

** (lightdm-gtk-greeter:1791): WARNING **: Failed to load user image: Failed to open file '/home/sean/.face': No such file or directory