For users who want to install WD on a Pi4, due to a memory leak in the bash version 5.1.4 included in the Pi's current bullseye OS, you should instead be running the legacy buster OS.
I have just checked in an installation fix for instillation of the Python libraries needed if you configure WD to create noise graph files.
I suspect this checkin may affect few if any WD users, but I like to keep you informed about changes which will result in a download when you 'git pull'