Kakeke with SC Product Options

Hello Community

I am trying to get SC Product Options to work with Zakeke. Here is the problem:

Go to https://www.dcmouthguards.com/collections/custom-mouth-guards/products/custom-mouthguard-graphics-builder

Select Mouthguard Options

Click on Customize

Go through the Kakeke Process.

Once on checkout, none of the Mouthguard Options (SC Product Options) show.

The only documentation for this is https://zakeke.zendesk.com/hc/en-us/articles/360019394340-Integrating-Zakeke-with-other-apps but it doesn’t seem to work (Start Designing button does not do anything).

Anyone solve this one before?