UnicodeDecodeError in AcpidListener

Onboard gives me the following error on my X1 Yoga 3rd Gen.

Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: /home/jb/.local/lib/python3.6/site-packages/gi/overrides/Gtk.py:1641: Warning: g_object_unref: assertion 'G_IS_OBJECT
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: return _Gtk_main(*args, **kwargs)
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: Exception in thread AcpidListener:
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: Traceback (most recent call last):
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: File "/usr/lib/python3.6/threading.py", line 916, in _bootstrap_inner
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: self.run()
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: File "/usr/lib/python3.6/threading.py", line 864, in run
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: self._target(*self._args, **self._kwargs)
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: File "/usr/lib/python3/dist-packages/Onboard/HardwareSensorTracker.py", line 262, in _run
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: for event in data.decode("UTF-8").splitlines():
Dez 14 01:07:45 jb-tp-u onboard.desktop[2367]: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xb0 in position 17: invalid start byte