Errors:
Malformed byte sequence: “e9”.
Malformed byte sequence: “e8”.
Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).
Bad value “iso-8859-1” for attribute “charset” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
A document must not include more than one “meta” element with its “name” attribute set to the value “description”.
Bad value “text/html; charset=iso-8859-1” for attribute “content” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
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.
Malformed byte sequence: “e7”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “navigation” for attribute “role” on element “aside”.
The “center” element is obsolete. Use CSS instead.
Attribute “border” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginwidth” attribute on the “iframe” element is obsolete. Use CSS instead.
The “marginheight” attribute on the “iframe” element is obsolete. Use CSS instead.
The “scrolling” attribute on the “iframe” element is obsolete. Use CSS instead.
The “align” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate ID “card-masonry”.
Malformed byte sequence: “e0”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “button” for attribute “type” on element “a”: Subtype missing.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Stray end tag “span”.
Malformed byte sequence: “ea”.
Stray end tag “center”.
The “align” attribute on the “table” element is obsolete. Use CSS instead.
The “rules” attribute on the “table” element is obsolete. Use CSS instead.
The “width” attribute on the “table” element is obsolete. Use CSS instead.
The “valign” attribute on the “tr” element is obsolete. Use CSS instead.
The “align” attribute on the “td” element is obsolete. Use CSS instead.
The “bgcolor” attribute on the “td” element is obsolete. Use CSS instead.
The “font” element is obsolete. Use CSS instead.
“'” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
Attribute “height” not allowed on element “tr” at this point.
End tag “a” violates nesting rules.
No “strong” element in scope but a “strong” end tag seen.
End tag “span” seen, but there were open elements.
Unclosed element “strong”.
Malformed byte sequence: “ee”.
Malformed byte sequence: “e2”.
Malformed byte sequence: “f4”.
Malformed byte sequence: “92”.
Stray end tag “a”.
End tag “td” seen, but there were open elements.
Malformed byte sequence: “96”.
The “width” attribute on the “td” element is obsolete. Use CSS instead.
Stray end tag “font”.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Stray start tag “script”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “card-masonry” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in French but the “html” start tag has an empty “lang” attribute. Consider using “lang="fr"” (or variant) instead.