Posts Element Not Working

Greetings- I created posts and added an element to the home page of our site (toward the bottom) to allow people to learn about our publications. The problem is that the posts are working correctly on the Posts part of WordPress (including the links working correctly) but when others click the posts to read them, it brings them to an “under construction” page.

I tried to update the URLs, thinking duplicating the posts to make them uniform when I wrote them was the issue, but that doesn’t help.

Any help is appreciated.

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