https://tools.wmflabs.org/cdnjs/ is out of sync compared to https://cdnjs.com/. E.g. material-design-icons is missing from the list, but is in https://tools-static.wmflabs.org/cdnjs/packages.json and https://tools-static.wmflabs.org/cdnjs/ajax/libs/material-design-icons/2.0.0/iconfont/MaterialIcons-Regular.ttf exists.
Probably the cronjob for tools.cdnjs is still commented out since the NFS corruption.