Errors:
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “{” instead.
Bad value “button” for attribute “type” on element “a”: Subtype missing.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Duplicate attribute “class”.
Duplicate attribute “data-href”.
Attribute “<div” not allowed on element “div” at this point.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “content” not allowed on element “div” at this point.
Duplicate ID “fb-root”.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “form” role is unnecessary for element “form”.
Attribute “<div” is not serializable as XML 1.0.
The first occurrence of ID “fb-root” was here.
This document appears to be written in Italian. Consider adding “lang="it"” (or variant) to the “html” start tag.
Italy IT