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 “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “a” violates nesting rules.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
The element “label” must not appear as a descendant of the “a” element.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
End tag “div” seen, but there were open elements.
Unclosed element “main”.
Stray end tag “main”.
Attribute “addthis:userid” not allowed on element “a” at this point.
Attribute “margin” not allowed on element “form” at this point.
Attribute “padding” not allowed on element “form” at this point.
Duplicate ID “fb-login”.
Attribute “alt” not allowed on element “div” at this point.
Duplicate ID “twitter-login”.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
Stray end tag “div”.
Warnings:
Attribute “addthis:userid” is not serializable as XML 1.0.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “fb-login” was here.
The first occurrence of ID “twitter-login” was here.
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