Ensure your composition name doesn't have special characters like / or * .
Here’s a step-by-step guide on how to install Bodymovin (the Lottie exporter for After Effects) and use the player on a website. how to install bodymovin
Edit > Preferences > Scripting & Expressions (Windows) or After Effects > Settings > Scripting & Expressions (Mac). Ensure your composition name doesn't have special characters