WooCommerce Grouped Products

Hello!

I am trying to create a ‘sub’ product that users can buy when they buy my main product, but it seems that the styling & set-up for grouped products is not working for me. I have created a ‘test’ product & when I preview it there is just a bunch of broken code on the front end. Have you seen this happen previously? Is there a fix for this?

I have the product hidden for now as my shop is live, but I can make it live if anyone has any ideas.

Thanks!

The page I need help with: [log in to see the link]