Can't add class or subclass features to "features and traits"

Hello, I purchased the Player's Handbook bundle and am unable to drag and drop any class or subclass features onto a character sheet to add them to the "features and traits" section of a 5e Roll20 sheet in any of my games. I am able to drag feats, spells, items, etc. My understanding was that the class and subclass features could also be dragged. Is there a way to do this?

The first post of the Player's Handbook thread lists what is currently dragable and what is not: Current Known PHB Issues: Subclasses and Subraces are currently not dragable, only the base Class and Race Feats are not dragable Class traits are not dragable OR are not dragging in correctly