404 facebook share wrong linked share

Hello,
Love the plugin, but today I got some issues.
At several posts it gives an error when trying to share on facebook:
for example this post:
http://www.neverrest.net/nieuwsbrief-februari-film/
Gives: The requested URL /nieuwsbrief-februari-film/ was not found on this server. Additionally, a…

The linkedin share gives me more possibilities, also from the testimonials in the sidebar.

I saved the permalinks settings again.
I checkmarked “share full URL” and dont have checkmarked “use shortlinks”.

Please help..

https://ww.wp.xz.cn/plugins/social-media-feather/