calling robofish-trackviewer-render results in error

Error Message:

(venv) root@6c6267688ae7:~/test# robofish-trackviewer-render -h
Traceback (most recent call last):
  File "/home/test/venv/bin/robofish-trackviewer-render", line 5, in <module>
    from robofish.trackviewer.render_video import main
  File "/home/test/venv/lib/python3.8/site-packages/robofish/trackviewer/render_video.py", line 10, in <module>
    from robofish.trackviewer.cpp import HeadlessContext, SimpleFramebuffer, FrameGrabber
ImportError: cannot import name 'HeadlessContext' from 'robofish.trackviewer.cpp' (/home/test/venv/lib/python3.8/site-packages/robofish/trackviewer/cpp.cpython-38-x86_64-linux-gnu.so)

Steps to reproduce:

1. (optional) create clean python virtual environment and activate it
2. install trackviewer via pip install robofish-trackviewer --extra-index-url https://robofish_core:6HL7yodhJMHWvK1msTEn@git.imp.fu-berlin.de/api/v4/projects/6392/packages/pypi/simple
3. call the trackviewer renderer via robofish-trackviewer-render
4. Error message should appear