Errors:
Bad value “Cache-Control” for attribute “http-equiv” on element “meta”.
Bad value “Pragma” for attribute “http-equiv” on element “meta”.
Bad value “Expires” for attribute “http-equiv” on element “meta”.
Attribute “action” not allowed on element “a” at this point.
Attribute “aria-selected” not allowed on element “span” at this point.
An element with “role=menuitem” must be contained in, or owned by, an element with “role=menubar” or “role=menu”.
Bad value “//www.facebook.com/sharer/sharer.php?u=https://maee.gouvernement.lu/fr.html&t=Ministère des Affaires étrangères et européennes // Le gouvernement luxembourgeois” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “//twitter.com/share?url=https://maee.gouvernement.lu/fr.html&text=Ministère des Affaires étrangères et européennes // Le gouvernement luxembourgeois” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Self-closing syntax (“/>”) used on a non-void HTML element. Ignoring the slash and treating as a start tag.
Bad value “” for attribute “sizes” on element “img”: Must not be empty.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “12.07.2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Bad value “11.07.2018” for attribute “datetime” on element “time”: The literal did not satisfy the time-datetime format.
Duplicate ID “topnav”.
Bad value “heading” for attribute “role” on element “li”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
The “article” role is unnecessary for element “article”.
The “contentinfo” role is unnecessary for element “footer”.
The “navigation” role is unnecessary for element “nav”.
The first occurrence of ID “topnav” 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).
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