attributes filter doesnt work

Hi folks,

i’m using the plugin, but i’m experienced some troubles with the attributes filter. It doesn’t work alone or with other filters too. The only filter that it works is the categories filter.

Link: http://dev.malchugani.com/

How to make the attributes filter to work?

Best Regards

https://ww.wp.xz.cn/plugins/woocommerce-products-filter/