Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
A slash was not immediately followed by “>”.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
Attribute “xmlns:v” not allowed here.
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “l” instead.
End tag “a” violates nesting rules.
No “strong” element in scope but a “strong” end tag seen.
Duplicate attribute “class”.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
The element “button” must not appear as a descendant of the “a” element.
The “center” element is obsolete. Use CSS instead.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Attribute “elemtype” not allowed on element “div” at this point.
End tag “h3” seen, but there were open elements.
Unclosed element “a”.
No “a” element in scope but a “a” end tag seen.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “navigation” role is unnecessary for element “nav”.
Attribute with the local name “xmlns:v” is not serializable as XML 1.0.
This document appears to be written in Spanish. Consider adding “lang="es"” (or variant) to the “html” start tag.
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