Blog Custom Feed Element Issue

Hi people, I need help!

This is my sitemap.

I'm trying to achieve the following:

1. Have 6 of my most recent blog posts on my homepage.

2. Have all of the blog posts within category ("Videoteka na kraju svemira", "Pristrani komentator" and "Diskoveri")

Posts are written and published, so I tried adding blog elements.

1. On my homepage I used magazine layout and set it up to show 6 of the most recent blog posts. Everything looks fine at this point

but... when I click on a link, it seems to be broken. It doesn't lead me directly to my blog post. Instead, I get this error.

When I click "See more posts", it leads me to "Blog" page with all posts, which I intend to hide. Only in this case can I come to the blog post.

And the same goes for trying to have all of the blog posts within category ("Videoteka na kraju svemira", "Pristrani komentator" and "Diskoveri").

Am I doing something wrong? Why those custom feed elements don't work.

Please help, it is the last thing I have to do before putting it live. :) Thanks!