Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
End tag “li” seen, but there were open elements.
Unclosed element “a”.
No “a” element in scope but a “a” end tag seen.
No “li” element in scope but a “li” end tag seen.
Bad value “100%” for attribute “width” on element “iframe”: Expected a digit but saw “%” 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The “frameborder” attribute on the “iframe” element is obsolete.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The “scrolling” attribute on the “iframe” element is obsolete.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 “p” seen, but there were open elements.
End tag “div” seen, but there were open elements.
End tag “aside” seen, but there were open elements.
End tag “h3” seen, but there were open elements.
Start tag “a” seen but an element of the same type was already open.
Element “ul” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
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