Error admin-ajax.php?postviews_id…

Hi i test my website in pingdom and i see this error:

mywebsite.com/wp-admin/admin-ajax.php?postviews_id=2687&action=yuzo-plus-views&is_singular=1&_=1467708855279

What can i do?

Thanks

https://ww.wp.xz.cn/plugins/yuzo-related-post/