My nav block in my article.html is not linking to the about, articles, or contact links. My code is below.

I've laid your code out below in a more legible way so that we can discuss it better if needs be.

The error that you're getting suggests that you're linking to a file that doesn't exist. Each time you're prepending the filename with ../ you're basically saying go back (or up) one directory level in your structure.

<nav>
  <ul>
    <li><a href="../../index.html">Home</a></li>
    <li><a href="../../index.html#about">About</a></li>
    <li><a href="../../index.html#articles">Articles</a></li>
    <li><a href="../../index.html#contact">Contact</a></li>
  </ul>
</nav>

So to answer your question, if you're getting the "The requested URL /index.html was not found on this server." error, that suggests that your index.html file isn't 2 directory levels back (or up) from the file that contains this code. To fix, if the index.html is in the root, remove the 2 ../ paths and go for a single / instead. If it's only 1 directory level different, just remove one.

<nav>
  <ul>
    <!-- If the index.html file is in the root, try this -->
    <li><a href="/index.html">Home</a></li>

    <!-- If it's only one directory level back, try this -->
    <li><a href="../index.html#about">About</a></li>

    <!-- If it's in the same directory level as this file, try this -->
    <li><a href="index.html#articles">Articles</a></li>

    <!-- If it's 3 levels back in the structure, try this -->
    <li><a href="../../../index.html#contact">Contact</a></li>
  </ul>
</nav>

Hope this helps but if you need more advice or help, let me know and i'll be happy to explain better and/or have a look further into the issue you're having.

It won't let me edit my question but the error I am getting is below.

The requested URL /index.html was not found on this server.

Thank you for responding so fast!! So I tried the examples that you laid out and my folder layout is (Folder) articles-->2017-->article.html so I would assume it would be ../../index.html? For some reason it keeps coming back with not found. My index.html is in the main(root?) folder. All of my other links going to my article.html file work seamlessly but its just going backwards which is causing me problems on all my links.

Thank you again for helping!!