Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “button” seen, but there were open elements.
Unclosed element “span”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “dropdownMenuLang”.
Element “button” not allowed as child of element “menu” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “menu” in this context. (Suppressing further errors from this subtree.)
Element “a” not allowed as child of element “menu” in this context. (Suppressing further errors from this subtree.)
Element “span” not allowed as child of element “menu” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The first occurrence of ID “dropdownMenuLang” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in English but the “html” start tag has an empty “lang” attribute. Consider using “lang="en"” (or variant) instead.
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