Uniconvertor failed

Steps to reproduce:

• open Inkscape
• open KDEnlive logo (official site)
• degroup
• CTRL+C on one logo

What happened?

Error message : UniConvertor failed:

Traceback (most recent call last):
  File "/usr/bin/uniconvertor", line 13, in <module>
    uniconv_run()
  File "/usr/lib/python2.7/dist-packages/uniconvertor/__init__.py", line 83, in uniconv_run
    from app.io import load
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/__init__.py", line 69, in <module>
    from conf.configurator import Configurator
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/conf/configurator.py", line 11, in <module>
    from app.events import connector
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/__init__.py", line 69, in <module>
    from conf.configurator import Configurator
  File "/usr/lib/python2.7/dist-packages/uniconvertor/app/conf/configurator.py", line 13, in <module>
    from sk1libs.utils.fs import gethome
ImportError: No module named sk1libs.utils.fs

What should have happened?

just nothing, i want to copy a logo on another .svg file

Inkscape Version and Operating System:

• Inkscape Version: ...
• Operating System: ... Xubuntu
• Operating System version: ... 16.04.5

https://kdenlive.org/wp-content/uploads/2017/01/kdenlive-logo-manual.svg