Theme seems to have a problem

I’ve downloaded the theme “lovebirds” and tried to install it a couple of times. It has failed each time. I have the parent theme “Forever” installed and working.

The preview does not even work on my site. In addition, the preview does not work on the ww.wp.xz.cn site here>>

https://ww.wp.xz.cn/themes/lovebirds/

Other themes are working fine on my wordpress site, including the parent theme to lovebirds… “Forever”