Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Duplicate attribute “id”.
Duplicate attribute “class”.
Attribute “<header” not allowed on element “div” at this point.
Stray end tag “header”.
Duplicate ID “content”.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
End tag “div” seen, but there were open elements.
Unclosed element “article”.
The “itemtype” attribute must not be specified on elements that do not have an “itemscope” attribute specified.
Stray end tag “article”.
Unclosed element “main”.
Stray end tag “main”.
Stray end tag “div”.
Attribute “;” not allowed on element “li” at this point.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
Forbidden code point U+0003.
Bad value “” for attribute “id” on element “a”: An ID must not be the empty string.
Warnings:
Attribute “<header” is not serializable as XML 1.0.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “content” was here.
The “main” role is unnecessary for element “main”.
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”.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Attribute “;” is not serializable as XML 1.0.
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).
United States US