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 “navigation” role is unnecessary for element “nav”.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
Empty heading.
The “contentinfo” role is unnecessary for element “footer”.
Errors:
Element “marquee” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Attribute “type” not allowed on element “iframe” at this point.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
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 “media” on element “link”: Media query ended prematurely.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The “itemprop” attribute was specified, but the element is not a property of any item.
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