Errors:
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:addthis” not allowed here.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “website” for attribute “itemtype” on element “meta”: The string “website” is not an absolute URL.
Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “name”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “option”.
Attribute “alt” not allowed on element “a” at this point.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
End tag “div” seen, but there were open elements.
Unclosed element “ul”.
Element “marquee” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
End tag “p” implied, but there were open elements.
Unclosed element “a”.
The “center” element is obsolete. Use CSS instead.
End tag “center” seen, but there were open elements.
No “a” element in scope but a “a” end tag seen.
No “p” element in scope but a “p” end tag seen.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “sumar” not allowed on element “img” at this point.
Attribute “esfuerzos""” not allowed on element “img” at this point.
Bad value “1” for attribute “rel” on element “a”: The string “1” is not a registered keyword.
Bad value “2” for attribute “rel” on element “a”: The string “2” is not a registered keyword.
Bad value “3” for attribute “rel” on element “a”: The string “3” is not a registered keyword.
Bad value “4” for attribute “rel” on element “a”: The string “4” is not a registered keyword.
Bad value “5” for attribute “rel” on element “a”: The string “5” is not a registered keyword.
Bad value “6” for attribute “rel” on element “a”: The string “6” is not a registered keyword.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:addthis” is not serializable as XML 1.0.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Attribute “esfuerzos""” is not serializable as XML 1.0.
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