Errors "Stray end tag head" and "An body start tag seen but an element of the same type was already open"

If I try to do the W3C validation with my site (www.primapaginaonline.it), DOCTYPE HTML5, I get some errors, but there are two that I don't understand.

The first is the error

Line 110, Column 7: Stray end tag head.

and on line 110 there is only

</head>

The other error is

Line 111, Column 24: An body start tag seen but an element of the same type was already open.

And the code of line 111 is

<body class="home blog">

And after that it says it cannot continue. How can I solve these?

Solution

When you validate your site, you should start from the beginning. Remove earlier errors and then check if the error still exists.

When I modified your code and only:

<!DOCTYPE html>
<html lang="it-IT" prefix="og: http://ogp.me/ns# fb: http://ogp.me/ns/fb#">

<head>
<meta charset="UTF-8" />
<meta name="viewport" content="width=device-width; initial-scale=1.0; maximum-scale=1.0; user-scalable=0;" />


<title>
 Prima Pagina Online  
</title>


</head>

was left at the beginning of file, there was no warning about head tag

EDIT

I looked at your code and the main problem is that you put Facebook code in head section. You should put it right after opening body tag.