Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “div” not allowed as child of element “hgroup” in this context. (Suppressing further errors from this subtree.)
Attribute “xmlns:v” not allowed here.
The “center” element is obsolete. Use CSS instead.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Element “style” not allowed as child of element “center” in this context. (Suppressing further errors from this subtree.)
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “cellspacing” attribute on the “table” element is obsolete. Use CSS instead.
The “cellpadding” attribute on the “table” element is obsolete. Use CSS instead.
The “border” attribute on the “table” element is obsolete. Use CSS instead.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
The “valign” attribute on the “td” element is obsolete. Use CSS instead.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
End tag “div” seen, but there were open elements.
Unclosed element “center”.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray end tag “div”.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Consider avoiding viewport values that prevent users from resizing documents.
Attribute with the local name “xmlns:v” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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