Export Lottie Animation from AfterEffects

Hello. I am trying to create an animation using AfterEffects, and following gudiance in this video: https://www.youtube.com/watch?v=2djbqUOtFgg

The issue I am having is that when I go to render the animation using Bodymovin, the render button is greyed out. Looking for help on why this is and how I could fix it.

Thanks!