Shortcode not show posts

Hi, I’m using the shortcode to display posts and filter categories.
Before it works correctly, but now, at first load of the page, shortcode doesn’t display posts.
It display categories filter, and if you select one category, it display its posts, but the first time you enter on the page anything post are loaded…

Please, can you help me?
You can see live error here: https://paugoethe.com/navlandis/blog/

The page I need help with: [log in to see the link]