In your sheet.json, one of the properties is "roll20userid". It needs to be a comma-separated string of user IDs of the people who are the author(s) of the sheet. For example, this is the sheet.json for the Exalted 2e sheet that I wrote with another user: { "html": "exalted2e.html", "css": "exalted2e.css", "authors": "Brian Shields, Benjamin Bandelow", "preview": "exalted2e.jpg", "roll20userid": "235259,442", "instructions": "..." } Your userid is the number that appears in the URL for your profile page. For example, your profile is <a href="https://app.roll20.net/users/49372" rel="nofollow">https://app.roll20.net/users/49372</a> and so your userid is 49372.