Need help with musehub

So I used to use a lot of musescore 3.0 a long time ago, but stopped making music for a while. I recently returned because I'm making the music for a game jam, and I decided to give musehub a try. I really like a few of these swing drum beats I am finding, and I want to add them to my score, but I can't figure out how. I click and drag them from the musehub app to my score in musescore 4.0, and when I hover it over a bar in the program the bar lights up and says "Copy", but releasing left mouse doesn't do anything. Am I doing things wrong? I tried to look for tutorials on how to use musehub but couldn't find anything.

Any help would be appreciated!