Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “ImageToolbar” for attribute “http-equiv” on element “meta”.
Bad value “revision” for attribute “rel” on element “link”: The string “revision” 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.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “topbar-search”.
Attribute “about” not allowed on element “article” at this point.
Attribute “content” not allowed on element “span” at this point.
Duplicate attribute “xml:lang”.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “content” not allowed on element “div” at this point.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Element “style” not allowed as child of element “footer” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “complementary” role is unnecessary for element “aside”.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “topbar-search” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
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