Errors:
Attribute “xmlns:og” not allowed here.
Attribute “xmlns:fb” not allowed here.
Bad value “” for attribute “href” on element “link”: Must be non-empty.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “value” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “img”.
Duplicate ID “searchform”.
Duplicate ID “basic-addon1”.
Duplicate ID “s”.
Duplicate ID “searchsubmit”.
End tag “header” seen, but there were open elements.
Unclosed element “div”.
The “center” element is obsolete. Use CSS instead.
End tag “a” violates nesting rules.
Warnings:
Attribute with the local name “xmlns:og” is not serializable as XML 1.0.
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “searchform” was here.
The first occurrence of ID “basic-addon1” was here.
The first occurrence of ID “s” was here.
The first occurrence of ID “searchsubmit” was here.
The “main” role is unnecessary for element “main”.
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