fatal error occurs on opening

[Joe DeGarmo]

Traceback (most recent call last):
  File "/usr/bin/ubuntu-tweak", line 110, in <module>
    launcher = TweakLauncher(session_bus, MainWindow())
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/mainwindow.py", line 234, in __init__
    proxy.enable_stable_source()
  File "/usr/lib/python2.6/dist-packages/ubuntutweak/policykit/dbusproxy.py", line 33, in __getattr__
    return self.__proxy.get_dbus_method(name, dbus_interface = self.INTERFACE)
AttributeError: 'NoneType' object has no attribute 'get_dbus_method'

[Joe DeGarmo (jwdegarmo)]

I need to know how to fix it or remove it. It causes an error in the update manage that says this:

'E:Malformed line 1 in source list /etc/apt/sources.list.d/ubuntu-tweak-stable.list (dist parse)'

It then closes the app.
Forgive me if this is an easy one. Any help is appreciated as I'm brand new to linux.
Thanks!

[Ding Zhou (tualatrix)]

Please give me the content of /etc/apt/sources.list.d/ubuntu-tweak-stable.list.

Open your terminal, type:

  gedit /etc/apt/sources.list.d/ubuntu-tweak-stable.list

[J. Austin Rodriguez (jeanaustinr)]

Hi Joe DeGarmo, are you behind a firewall or are you using a proxy server to connect through the internet?

[Eduardo (guajararock)]

I have a problem trying to run the program.

Ubuntu 12.04 Precise 64 Bit.

~$ ubuntu-tweak
Traceback (most recent call last):
  File "/usr/bin/ubuntu-tweak", line 72, in <module>
    window = UbuntuTweakWindow(feature=options.feature, module=options.module)
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 292, in __init__
    tweaks_page = FeaturePage('tweaks')
  File "/usr/lib/python2.7/dist-packages/ubuntutweak/main.py", line 178, in __init__
    viewport = Gtk.Viewport(shadow_type=Gtk.ShadowType.NONE)
TypeError: __init__() got an unexpected keyword argument 'shadow_type'

[Ding Zhou (tualatrix)]

Please upgrade 0.6.2: http://ubuntu-tweak.com/