Errors:
Attribute “xmlns:fb” not allowed here.
Attribute “xmlns:addthis” not allowed here.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
No space between attributes.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “admonsters-logo”.
Duplicate ID “ad”.
Duplicate ID “monsters-8”.
Duplicate ID “monsters-7”.
Duplicate ID “monsters-6”.
Duplicate ID “monsters-5”.
Duplicate ID “monsters-4”.
Duplicate ID “monsters-3”.
Duplicate ID “monsters-2”.
Duplicate ID “monsters-1”.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Stray end tag “section”.
No “p” element in scope but a “p” end tag seen.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “forum-widget”.
The element “header” must not appear as a descendant of the “footer” element.
Stray end tag “strong”.
Warnings:
Attribute with the local name “xmlns:fb” is not serializable as XML 1.0.
Attribute with the local name “xmlns:addthis” is not serializable as XML 1.0.
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “admonsters-logo” was here.
The first occurrence of ID “ad” was here.
The first occurrence of ID “monsters-8” was here.
The first occurrence of ID “monsters-7” was here.
The first occurrence of ID “monsters-6” was here.
The first occurrence of ID “monsters-5” was here.
The first occurrence of ID “monsters-4” was here.
The first occurrence of ID “monsters-3” was here.
The first occurrence of ID “monsters-2” was here.
The first occurrence of ID “monsters-1” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “main” role is unnecessary for element “main”.
The “complementary” role is unnecessary for element “aside”.
The first occurrence of ID “forum-widget” was here.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
The “contentinfo” role is unnecessary for element “footer”.
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