Links aren't working in blog

I integrated this blog with my client’s website. I have the style sheet formatted so it looks really good. When I clicked the links to view the blog post, add a comment, etc. I get a page cannot be displayed error.

Link to blog: https://www.netcastingministries.com/blog/

I tried changing Themes to see if they would work and they still do not.

Any advice would be appreciated. Thanks!