Plugin doesn’t work

Hello,
I installed the plugin, created a variable product but it seems nothing is changed in the product page. It look exactly the same as pre-installing the plugin.

Im using Bard-pro Theme: https://wp-royal.com/themes/item-bard-pro/

The product page is: https://www.almahippie.com/product/top-de-yoga-geometria-sagrada-negro/

would appreciate your help solving this.
Thanks.