Errors:
Bad value “nl_NL” for attribute “lang” on element “html”: The language subtag “nl_nl” is not a valid language subtag.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Attribute “content” not allowed on element “link” at this point.
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “file” for attribute “rel” on element “a”: The string “file” is not a registered keyword.
Element “div” not allowed as child of element “label” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Attribute value missing.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “div” not allowed as child of element “h3” in this context. (Suppressing further errors from this subtree.)
Attribute “ipad” not allowed on element “img” at this point.
Attribute “and” not allowed on element “img” at this point.
Attribute “applewatch” not allowed on element “img” at this point.
The “itemprop” attribute was specified, but the element is not a property of any item.
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