Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “stylesheet” for attribute “type” on element “link”: Subtype missing.
Element “link” is missing one or more of the following attributes: “itemprop”, “property”, “rel”.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Element “style” not allowed as child of element “main” in this context. (Suppressing further errors from this subtree.)
Attribute “allow” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
End tag had attributes.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “nav-tab”.
Duplicate ID “nav-tabContent”.
Element “a” not allowed as child of element “picture” in this context. (Suppressing further errors from this subtree.)
Element “picture” is missing a required instance of child element “img”.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “nav-tab” was here.
The first occurrence of ID “nav-tabContent” was here.
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