Plugin not working with Clipper theme latest version ( App Themes)

Hi,

I tried this plugin to create custom categories in clipper coupon theme latest version but it is breaking the coupon listing page. Pls suggest a solution. I urgently need a custom taxonomy for my site. Also I want to display the custom taxonomy on the side bar.

Regards,

https://wordpress.org/plugins/wck-custom-fields-and-custom-post-types-creator/