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Image reveal and follow mouse on hover

Hi,

I am trying to create an effect where an image appears and follows the mouse on hover. I am trying to clone the code from this project: Webflow - GB-afterlife

I am trying to recreate the effect in the “List-contain” section of the above project. I have cloned the project and the effect works, however when I copy it into my own project, it does not. I am a beginner at webflow and would really appreciate any help!

Thank you!

Here is my public share link:
https://preview.webflow.com/preview/portfolio-aedf85?utm_medium=preview_link&utm_source=designer&utm_content=portfolio-aedf85&preview=6b28c21efacce014de78cfa9b45d3b73&workflow=preview