Cinderella berries

Exploration Stage: Thanksgiving Fair
From: Juliette
Description: You think the clue that the fog has hidden the gala is in the last Thanksgiving artifact, don't you? Let's look for the golden berries, dear friends. I want to feel like Cinderella! If what you wrote in your letter is true, then maybe I have a little secret wish too...
Completed: It must be a hidden box of golden nuts! But... it looks like it's just a shell with nothing in it. And my wish didn't come true. I wonder if it's broken?