Some problem with HTML in ww.wp.xz.cn support

Hi,

I think there is some problem with HTML https://ww.wp.xz.cn/support/topic/doesnt-work-with-wc-secondary-product-thumbnail-or-yith-infinate-scroll/
Page is broken and displayed elements incorrect. This problem is on such browsers Opera, Chrome, Firefox.
I can’t understand where I must write about this problem.

Thanks