Export Lottie Animation from AfterEffects

Hello. I am trying to create an animation using AfterEffects, and following gudiance in this video: How to animate a video on scroll — After Effects & Lottie in Webflow - YouTube

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.