Plugin does not work in woodmart

I install the WooCommerce Bulk Variations plugin https://www.elementstark.com/solutions/woocommerce-bulk-variation-forms/, when I select products to add to the cart I get an error: not product in cart

You can see it in the following link: http://shineartshop.chapps.biz/product/iris-foil-20/
I already confirmed that the problem is with woodmart, changing from plugin to storefront and there if the plugin works I do not get an error. Also the developer of the plugin verified and suggested talking with you.
The current page is a test site and we are preparing the migration from prestashop to woocommerce.
The plugin that installs is fundamental for this web page since it is a wholesale siot and the order process is critical.
I also attach the woocommerce status report
If there is another way or plugin to replace the current one, please let me know.

Thank you