Plugin not working

Hello,

I’m trying to use your plugin with my site (I’m using Jupiter theme), in addition to YITH Name your Price plugin. Everything works fine, but when I click on a variation and place my price, the cart doesn’t sum up the quantity. How could we solve this?

To get into the page, you must enter the password. It’s “demo”.

Thanks in advance. Kind Regards.

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