Plugin not working on Hestia product page

First I want to thank to the developers of this amazing plugin; Thank You guys and girls.

I have a small problem though – the plugin does not work on the product page with Hestia theme, but the same is with other themes. Both the plugin and the theme are free versions.
Whenever I want to change the price on product page, it only add “#” to the link and of course nothing happens.
(I use on the product page the widget which I inserted in the menu bar)
The interesting thing is that if I enter the “customize” mode, the widget works.

Once again, thank you for your great work.

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