No working

Have you put it manualy? or have you activate? put here a link please, or more details.

I am testing in this website

I no can see relationed content in the final of post:
https://mirutafacil.com/2014/01/nueva-ruta-no-anunciada-59b/

The Activate related content is ON with default options (CSS and others)
Thanks for support

for the time being i don`t know why this occurs. The other option works? Pagination, author…?

Do you use the_content() for showing post content? Or modification?

I’m sorry I can not help more.