Mate-tweak does not start on kinetic

[madigal]

Kinetic with Mate desktop

From menu it fails to start
From terminal, get these errors:

Traceback (most recent call last):
  File "/usr/bin/mate-tweak", line 56, in <module>
    gi.require_version('Notify', '0.7')
  File "/usr/lib/python3/dist-packages/gi/__init__.py", line 129, in require_version
    raise ValueError('Namespace %s not available for version %s' %
ValueError: Namespace Notify not available for version 0.7

[lotuspsychje (lotuspsychje)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. Please execute the following command only once, as it will automatically gather debugging information, in a terminal:
apport-collect 1981828

When reporting bugs in the future please use apport by using 'ubuntu-bug' and the name of the package affected. You can learn more about this functionality at https://wiki.ubuntu.com/ReportingBugs.

[madigal (osse7)]

The recent updated packages received recently (from proposed) have solved that issue.
Tweak loads and works as expected from menu and terminal, without error shown.