i used on http://stuerzelberg.net the Hueman Template and Lightbox
Responsive Lightbox but Lightbox didn’t work.

Eg: http://stuerzelberg.net/entstehungsgeschichte-des-staendebaums-in-stuerzelberg/

No idea what is going wrong.

Thanks and Regards Dirk

Very strange,

I found the Problem.

Switched off “Display social sharing buttons in your single posts” within
the Template Global Settings and now it is working fine.

Anyway it is working now.

Details: https://wordpress.org/support/topic/lightbox-not-working-on-posts/#post-8251046