The_meta and wp_get_post_image not showing on page that has blog

Hello there,

I am working on a website and can’t get my head around the following. The site has multiple static pages, and one blog page. I set these options through the admin panel/settings/reading. All works fine.
Except, just on the blog page, the_meta and wp_get_post_image are not working, the relevant divs show up but the php code does not get executed, so it seems. Also, I’m unsure which php page WP calls for the blog page. Any help is much appreciated. The site can be found here and the blog page here. Thanks!