Go to Appearence, Editor, then Header.php, look where is written:

</header><!-- #header -->

and add the code after :

Press Save, it will work fine!You must clear your cache to see it!

I put the code in my real site, I tested using https://varvy.com/ , and I made overzealous and I tested it with http://www.bing.com/webmaster/diagnostics/seo/anal...

The error has disappeared.

You can see my other training here:

https://my.wealthyaffiliate.com/dorina62/training