Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Character reference was not terminated by a semicolon.
The “center” element is obsolete. Use CSS instead.
No space between attributes.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
A slash was not immediately followed by “>”.
Attribute “<” not allowed on element “img” at this point.
Attribute “a” not allowed on element “img” 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.
End tag “center” seen, but there were open elements.
Unclosed element “a”.
End tag “aside” seen, but there were open elements.
End tag “p” seen, but there were open elements.
Start tag “a” seen but an element of the same type was already open.
No “a” element in scope but a “a” end tag seen.
No “p” element in scope but a “p” end tag seen.
Unclosed element “center”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
Attribute “<” is not serializable as XML 1.0.
The “contentinfo” role is unnecessary for element “footer”.
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