Getting error with new purchase

I purchased a couple of decks off of the marketplace and went to include them in one of my games and I get this error. There was an error when trying to include the addon  Wandering Monster Deck: Dungeon :  no implicit conversion of String into Integer I have added other products before with no issues, not sure what is happening here
CeeJay B.
Roll20 Team
Hi Troy, A few questions, if you don't mind: What is the name of the game you're referring to? What are the names of the addons that you are trying to include in it? Can you reproduce this same behavior in a new game?
The game I'm trying to get it into is D&D chapter 2. The add-ons are wandering monster deck dungeon, and wandering monster deck Underground. I did open a new game and they both opened in there.