Problem creating add-on for marketplace

I'm clearly missing a step, but can't figure out what. I made a marketplace add-on from one of my games. I submitted it to R20 and they replied that I should put the assets into a folder, so clearly, they were able to see the content. I did what they suggested, resubmitted it and they approved it. However, they said I should test it myself before activating. So I created a new game and added my add-on to it, but when I load the new game, I don't see my content.

Hi Ed! You should be reporting this on the Marketplace Creator Discord. There you have a much better chance of contacting or being seen by a Team Member, as well as advice from many other creators. PM me if you need an invite.