Hi @fotis
Could you please share the XML export file of your field group? I suspect you set the location of the field group to a page, but you call the fields from the sidebar. In this case, you need to pass the post/page ID where the fields are assigned like this:
the_field('arxikh', 99);
Where “99” is the post/page ID. This page should give you more idea about it: https://www.advancedcustomfields.com/resources/get_field/.
I hope this makes sense 🙂
