Main blog page not showing recent posts

Hey, our main blog page (/blog) is not showing recent posts. It just says “Ready to publish you first post?”. But I’ve published 5 posts, all of which show up in the blog dashboard and all of which show up online by going to the URL directly (/blog/post-1 or /blog/post-2 etc.).

I’m not sure what I did wrong, any help?

https://wordpress.org/plugins/wp-blog-and-widgets/