Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “navigation” for attribute “role” on element “ul”.
An element with “role=menuitem” must be contained in, or owned by, an element with “role=menubar” or “role=menu”.
The “font” element is obsolete. Use CSS instead.
Bad value ““407”” for attribute “height” on element “img”: Expected a digit but saw ““” instead.
Attribute “alt” not allowed on element “a” at this point.
Attribute “webkitallowfullscreen” not allowed on element “iframe” at this point.
Attribute “mozallowfullscreen” not allowed on element “iframe” at this point.
Attribute “oallowfullscreen” not allowed on element “iframe” at this point.
Attribute “msallowfullscreen” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “user"false"” not allowed on element “a” at this point.
Element “ul” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “key” not allowed on element “a” at this point.
Warnings:
The “navigation” role is unnecessary for element “nav”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “user"false"” is not serializable as XML 1.0.
This document appears to be written in Dutch. Consider adding “lang="nl"” (or variant) to the “html” start tag.
Netherlands NL