font error when running demo code #101

Hi,
When i try running example code inside example folder i get below error:
ValueError: Selected font Arial at marker position Chr3:4035330-4035331 is not available. Check plotsr_available_font_names.txt for list of available system markers

could you please suggest a quick fix?

Thanks,
Mario

P.S. I use fedora instance, and also installed it using conda.