WARNING : Shell not installed or running
WARNING : Shell not running
None
INFO    : GSettings missing key org.gnome.nautilus.desktop (key computer-icon-visible)
WARNING : Error detecting shell
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gtweak/tweaks/tweak_group_shell_extensions.py", line 278, in __init__
    raise Exception("Shell not running or DBus service not available")
Exception: Shell not running or DBus service not available