Errors:
Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “h3” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “ns_topbar_btn”.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
Bad value “group1” for attribute “rel” on element “a”: The string “group1” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
The element “label” must not appear as a descendant of the “a” element.
The element “input” must not appear as a descendant of the “a” element.
The element “button” must not appear as a descendant of the “a” element.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “ns_topbar_btn” was here.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
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