Can't see why I am not passing

1

My code works as it should but I can’t see why I am not passing test number 10.

2

You have put too many links on your menu.
There should only be links to the sections with class="main-section but you have links to the <h3> elements there as well.
They should either be made sections or there should be no links
/Jakob

3

Capture

4

Exactly. But on your menu there is also links to the h3 level elements, one example is

<h3 id="What_you_should_already_know">What you should already know</h3>

This not have a link or it should be made to a section if you want it to be on the navigation
/Jakob