Onboard crashes on start

Hello. I'm using Manjaro KDE 18.1.5 with 5.3.18 kernel. When i try to launch Onboard, it crashes immediately. Launching from Terminal gives me this:
[xorpix@xorpix-pc ~]$ /usr/bin/onboard
Traceback (most recent call last):
  File "/usr/bin/onboard", line 32, in <module>
    from Onboard.Exceptions import chain_handler
ModuleNotFoundError: No module named 'Onboard'

So, that's it. Will wait for any help. Thanks.