Errors:
A “charset” attribute on a “meta” element found after the first 1024 bytes.
Bad value “cleartype” for attribute “http-equiv” on element “meta”.
No “li” element in scope but a “li” end tag seen.
Bad value “nav” for attribute “role” on element “nav”.
Attribute “about” not allowed on element “article” at this point.
Element “img” is missing required attribute “src”.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Attribute “about” not allowed on element “div” at this point.
Duplicate attribute “class”.
Bad value “true” for attribute “allowfullscreen” on element “iframe”.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Attribute “content” not allowed on element “span” at this point.
The element “header” must not appear as a descendant of the “footer” element.
Attribute “placeholder” not allowed on element “select” at this point.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “itemprop” attribute was specified, but the element is not a property of any item.
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 “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
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