Missing "Views" Column in Admin Post View Backend

Hey,

after installing and activating the plugin, I am missing the Views-Column in “All Posts” Admin Backend.

Can you help me with this?

> WordPress 4.4.2
> Theme Twenty Sixteen
> Post views Stats 1.1.1
> http://www-blogperle.de

Thank you in advance,
Vince

https://ww.wp.xz.cn/plugins/post-views-stats/