I’m locally on Material 3.0.2 - you can also do git checkout tags/3.0.2 and see if this works? If this works, I’ll tag the dependency in IconSet so it only pulls the older version for now, until I can fix. IIRC they fundamentally restructured the icons in 4 and it’s a minor pain to figure out parsing the new folder structure 
This should probably not be an error, also - it’s too easy to refer to something that isn’t there? I’ll probably chance so it gives you a warning and a silent icon.