Javascript error in PPOM addon

Hi, I recently installed N-Media WooCommerce PPOM and tried to add a single Meta grups with a simple option (Color) each option has a related price. I attached the meta to a product. You can see it here: https://www.amararcreacions.com/ca/producte/cinturo-de-tela-infantil/

Everything works fine, except when I try to add the product to the cart. It simply doesn’t work. I’m unable to add this product to the cart. It shows the error:

Sorry, an error has occurred. Please enable JavaScript or contact site owner.

I don’t know where to check to solve this issue. Any ideas?

Many thanks,
Catalina.

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