How to solve 3D model viewer errors on custom built theme?

Hi all,

I’m adding the 3D model viewer to a custom built theme, and running into errors. I’ve tried setting it up with the bare minimum amount of options, and I’ve also tried duplicate the Debut setup, and no matter what I do I get these two errors from the model-viewer JS library.

Here’s a preview link: https://mlehgu07a1kq7ytb-9667641402.shopifypreview.com/products_preview?preview_key=c38117b4ccec1ee0d6b6e08af3918685

Any help or hints would be much appreciated! Thanks