matplotlib has trouble

[RijndertAriese]

Hi,

Thanks for your amazing work!
I'm trying to integrate my timeseries experiment and all code does work out. However, once I want to plot using matplotlib it gives me this

font family ['Bitstream Vera Sans'] not found. Falling back to DejaVu Sans

It tried resetting my font by plt.rcParams['font.family'] = 'sans-serif', and while this removed the error it just didn't give any output. No plot and no text/information.

This is happening using both the integrated scanpy function as well as using the Harmony package itself. I noticed that when I just loaded scanpy and did not run the sc.external.tl.harmony_timeseries() yet, the umaps show just fine. As soon as I run the command I have this behaviour. However, when I do import Harmony from the start, the plots don't show.

Hope you can help me here!

Cheers,
Rijndert