I see your screenshots, although I don’t see “nothing here.”
That said, it looks like perhaps you have not yet published any posts, so when you’re looking at your posts page (or a query loop block, if you’ve added one), it’s normal that you would see a “nothing found” message – there are no posts to be displayed.
Do you intend to have any posts for a blog or news section, or are you just using static pages?
Are you using a Query Loop block on the page you’re seeing the “nothing found” error on? Or is it set as your Posts Page?