Trouble uploading file

I am trying to use the template from How to create an online 3D gallery. | by Shapespark | Medium, however when I try to upload it, it gives me the popup Scene upload failed: you cannot upload scenes with a custom body-end.html file. Upgrade the Shapespark license or remove the file from the scene directory. Does anyone know where I would find these custom body-end.html files so I can delete them. Additionally when I try and add it on the web version I get the popup Scene import failed: Invalid scene data assistance in this would be greatly appriciated.
Thank you

Hi @Kaebo!
Your scene should be in Documents/Shapespark/your-scene-name. Inside it there should be a body-end.html. I hope this helps!