SublimeLinter-html-tidy up on what swears?

Hello!
Friends, prompt how to be?
Set SublimeLinter_html_tidy (established under article https://habrahabr.ru/post/262137/ )
Decided to check the code, coy Chago I fixed, but now he swears, and I do not understand the reason and how to fix it...
The class header and end header - shows the errors and what is it?

<header class="main-head" style="background-image: url(img/header_bg.jpg);">
...
</header>

Shows an error in the nav tag

<nav class="main-mnu">
...
</nav>

In section:

<section class="homesect section_1" id="s1">
...
</section>

<section class="section_2 homesect" id="u2">
...
</section>

<section class="homesect s_dark section_3" id="r3">
...
</section>

 On the closing tag of this block, no comments...