Greetings
Just set up the enviro plus with particle monitor on my Rasbury pi. It is all working but when I come to link to the Enviro webpage and run the app.py I get an error message relating to fonts. Is this a known problem and how can I fix it. ?
Have a look see here and see if its related to your issue.
https://www.raspberrypi.org/forums/viewtopic.php?f=106&t=269440