Esta postagem pode ser útil:
Go to /usr/lib/python2.7/dist-packages/gtweak/tweakview.py & find the line, that generated an error: self._right_header.props.decoration_layout = ":" + tokens[1]
One line before that there should be if tokens != None: Change that to if not tokens:
The first one doesn't account for tokens being empty, which, for some reason, is the case. Hope that helped.