Plugin doesnt filter

hello,

first, thank you for your plugin it seems to be perfect if it works. But in my case, I don’t know why it didnt work..
The display of category and posts is perfect but the filter doesn’t work.
this is the page of the website : http://www.gryaljewelry.com/catalog

Can you explain me why please?

https://wordpress.org/plugins/quicksand-jquery-post-filter/