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”.
A slash was not immediately followed by “>”.
“"” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
No space between attributes.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Duplicate attribute “0""”.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
Attribute “www.googletagmanager.com” not allowed on element “iframe” at this point.
Attribute “ns.html?id” not allowed on element “iframe” at this point.
Bad value “” for attribute “height” on element “iframe”: The empty string is not a valid non-negative integer.
Attribute “0""” not allowed on element “iframe” at this point.
Bad value “” for attribute “width” on element “iframe”: The empty string is not a valid non-negative integer.
Attribute “display:none;visibility:hidden""” 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.
Element “img” is missing required attribute “src”.
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Attribute “sl-processed” not allowed on element “a” at this point.
The text content of element “time” was not in the required format: The literal did not satisfy the time-datetime format.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
End tag “article” seen, but there were open elements.
Unclosed element “div”.
The element “header” must not appear as a descendant of the “footer” element.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Attribute “ns.html?id” is not serializable as XML 1.0.
Attribute “0""” is not serializable as XML 1.0.
Attribute “display:none;visibility:hidden""” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “contentinfo” role is unnecessary for element “footer”.
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