Plugins not able to install directly from ww.wp.xz.cn

Hi all,

I facing problem on directly install the plugins fro ww.wp.xz.cn.
When I install, it will loading for a long time and jump back to my blog page and show the message below:

Oops! That page can’t be found.
It looks like nothing was found at this location. Maybe try a search?

It happen to certain plugins and themes but not all. I tried Jetpack and BuddyPress is failed to install but Yoast SEO and Contact Form 7 is installing well.

It is also working well if I download the plugins file and upload to my hosting server.

Please assist.

Thank you.