Errors:
Element “script” must not have attribute “charset” unless attribute “src” is also specified.
The text content of element “script” was not in the required format: Expected space, tab, newline, or slash but found “a” instead.
Element “transition” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Any “input” descendant of a “label” element with a “for” attribute must have an ID value that matches that “for” attribute.
Duplicate ID “addthis_share_lightbox”.
Duplicate ID “translateLanguageLightbox”.
Duplicate ID “main”.
Attribute “@click” not allowed on element “li” at this point.
Bad value “https://www.youtube.com/user/associationhec/search?query=conseils du coach” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “https://www.hecalumni.fr/carrieres?q=*&facets[contract_id][]=2428&facets[from][]=0&facets[size][]=20” for attribute “href” on element “a”: Illegal character in query: “[” is not allowed.
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Duplicate ID “headerDump”.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “submenu-1033”.
Duplicate ID “submenu-21101”.
No space between attributes.
Duplicate attribute “class”.
Duplicate ID “submenu-21107”.
Duplicate ID “submenu-21103”.
Duplicate ID “submenu-1”.
Duplicate ID “submenu-51”.
Duplicate ID “submenu-22153”.
Duplicate ID “submenu-71”.
Duplicate ID “submenu-2941”.
Duplicate ID “submenu-3023”.
Duplicate ID “submenu-2939”.
Duplicate ID “submenu-2937”.
Duplicate ID “submenu-2943”.
Duplicate ID “submenu-3029”.
Duplicate ID “submenu-2945”.
Duplicate ID “submenu-3021”.
Duplicate ID “submenu-107”.
Duplicate ID “submenu-21105”.
Duplicate ID “submenu-3019”.
Duplicate ID “submenu-8823”.
Duplicate ID “submenu-3017”.
Duplicate ID “submenu-21301”.
Duplicate ID “submenu-3”.
Duplicate ID “submenu-2833”.
Duplicate ID “submenu-31”.
Duplicate ID “submenu-253”.
Duplicate ID “submenu-99”.
Duplicate ID “submenu-101”.
Duplicate ID “submenu-103”.
Duplicate ID “submenu-29”.
Duplicate ID “submenu-35”.
Duplicate ID “submenu-2903”.
Duplicate ID “submenu-2905”.
Duplicate ID “submenu-2907”.
Duplicate ID “submenu-2909”.
Duplicate ID “submenu-2913”.
Duplicate ID “submenu-21094”.
Duplicate ID “submenu-21100”.
Duplicate ID “submenu-21092”.
Duplicate ID “submenu-95”.
Duplicate ID “submenu-3027”.
Duplicate ID “submenu-2917”.
Duplicate ID “submenu-21096”.
Duplicate ID “submenu-21098”.
Duplicate ID “submenu-87”.
Duplicate ID “submenu-3031”.
Duplicate ID “submenu-2897”.
Duplicate ID “submenu-2899”.
Duplicate ID “submenu-2895”.
Duplicate ID “submenu-2893”.
Duplicate ID “submenu-9”.
Duplicate ID “submenu-111”.
Duplicate ID “submenu-7237”.
Duplicate ID “submenu-7239”.
Duplicate ID “submenu-21810”.
Duplicate ID “submenu-7243”.
Duplicate ID “submenu-21811”.
Duplicate ID “submenu-7241”.
Duplicate ID “submenu-7249”.
Duplicate ID “submenu-7245”.
Duplicate ID “submenu-7247”.
Duplicate ID “submenu-11”.
Duplicate ID “submenu-41”.
Duplicate ID “submenu-3033”.
Duplicate ID “submenu-3035”.
Duplicate ID “submenu-23344”.
Duplicate ID “submenu-19345”.
Duplicate ID “submenu-43”.
Duplicate ID “submenu-2863”.
Duplicate ID “submenu-45”.
Duplicate ID “submenu-2861”.
Duplicate ID “submenu-2865”.
Duplicate ID “submenu-47”.
Duplicate ID “submenu-21045”.
Duplicate ID “submenu-21”.
Duplicate ID “submenu-23”.
Duplicate ID “submenu-17”.
Duplicate ID “submenu-13”.
Duplicate ID “submenu-933”.
Duplicate ID “submenu-931”.
Duplicate ID “submenu-2867”.
Duplicate ID “submenu-23321”.
Duplicate ID “submenu-21090”.
Duplicate ID “submenu-2873”.
Duplicate ID “submenu-21279”.
Duplicate ID “submenu-23269”.
Duplicate ID “__pass”.
Element “postlink” not allowed as child of element “li” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “loginform”.
Duplicate ID “community_login”.
Duplicate ID “login_result”.
Duplicate attribute “border”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
The “for” attribute of the “label” element must refer to a non-hidden form control.
Warnings:
Attribute “@click” is not serializable as XML 1.0.
The first occurrence of ID “addthis_share_lightbox” was here.
The first occurrence of ID “translateLanguageLightbox” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “main” was here.
The first occurrence of ID “headerDump” was here.
Attribute “v-bind:class” is not serializable as XML 1.0.
The first occurrence of ID “submenu-1033” was here.
The first occurrence of ID “submenu-21101” was here.
The first occurrence of ID “submenu-21107” was here.
The first occurrence of ID “submenu-21103” was here.
The first occurrence of ID “submenu-1” was here.
The first occurrence of ID “submenu-51” was here.
The first occurrence of ID “submenu-22153” was here.
The first occurrence of ID “submenu-71” was here.
The first occurrence of ID “submenu-2941” was here.
The first occurrence of ID “submenu-3023” was here.
The first occurrence of ID “submenu-2939” was here.
The first occurrence of ID “submenu-2937” was here.
The first occurrence of ID “submenu-2943” was here.
The first occurrence of ID “submenu-3029” was here.
The first occurrence of ID “submenu-2945” was here.
The first occurrence of ID “submenu-3021” was here.
The first occurrence of ID “submenu-107” was here.
The first occurrence of ID “submenu-21105” was here.
The first occurrence of ID “submenu-3019” was here.
The first occurrence of ID “submenu-8823” was here.
The first occurrence of ID “submenu-3017” was here.
The first occurrence of ID “submenu-21301” was here.
The first occurrence of ID “submenu-3” was here.
The first occurrence of ID “submenu-2833” was here.
The first occurrence of ID “submenu-31” was here.
The first occurrence of ID “submenu-253” was here.
The first occurrence of ID “submenu-99” was here.
The first occurrence of ID “submenu-101” was here.
The first occurrence of ID “submenu-103” was here.
The first occurrence of ID “submenu-29” was here.
The first occurrence of ID “submenu-35” was here.
The first occurrence of ID “submenu-2903” was here.
The first occurrence of ID “submenu-2905” was here.
The first occurrence of ID “submenu-2907” was here.
The first occurrence of ID “submenu-2909” was here.
The first occurrence of ID “submenu-2913” was here.
The first occurrence of ID “submenu-21094” was here.
The first occurrence of ID “submenu-21100” was here.
The first occurrence of ID “submenu-21092” was here.
The first occurrence of ID “submenu-95” was here.
The first occurrence of ID “submenu-3027” was here.
The first occurrence of ID “submenu-2917” was here.
The first occurrence of ID “submenu-21096” was here.
The first occurrence of ID “submenu-21098” was here.
The first occurrence of ID “submenu-87” was here.
The first occurrence of ID “submenu-3031” was here.
The first occurrence of ID “submenu-2897” was here.
The first occurrence of ID “submenu-2899” was here.
The first occurrence of ID “submenu-2895” was here.
The first occurrence of ID “submenu-2893” was here.
The first occurrence of ID “submenu-9” was here.
The first occurrence of ID “submenu-111” was here.
The first occurrence of ID “submenu-7237” was here.
The first occurrence of ID “submenu-7239” was here.
The first occurrence of ID “submenu-21810” was here.
The first occurrence of ID “submenu-7243” was here.
The first occurrence of ID “submenu-21811” was here.
The first occurrence of ID “submenu-7241” was here.
The first occurrence of ID “submenu-7249” was here.
The first occurrence of ID “submenu-7245” was here.
The first occurrence of ID “submenu-7247” was here.
The first occurrence of ID “submenu-11” was here.
The first occurrence of ID “submenu-41” was here.
The first occurrence of ID “submenu-3033” was here.
The first occurrence of ID “submenu-3035” was here.
The first occurrence of ID “submenu-23344” was here.
The first occurrence of ID “submenu-19345” was here.
The first occurrence of ID “submenu-43” was here.
The first occurrence of ID “submenu-2863” was here.
The first occurrence of ID “submenu-45” was here.
The first occurrence of ID “submenu-2861” was here.
The first occurrence of ID “submenu-2865” was here.
The first occurrence of ID “submenu-47” was here.
The first occurrence of ID “submenu-21045” was here.
The first occurrence of ID “submenu-21” was here.
The first occurrence of ID “submenu-23” was here.
The first occurrence of ID “submenu-17” was here.
The first occurrence of ID “submenu-13” was here.
The first occurrence of ID “submenu-933” was here.
The first occurrence of ID “submenu-931” was here.
The first occurrence of ID “submenu-2867” was here.
The first occurrence of ID “submenu-23321” was here.
The first occurrence of ID “submenu-21090” was here.
The first occurrence of ID “submenu-2873” was here.
The first occurrence of ID “submenu-21279” was here.
The first occurrence of ID “submenu-23269” was here.
The first occurrence of ID “__pass” was here.
The first occurrence of ID “loginform” was here.
The first occurrence of ID “community_login” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
The first occurrence of ID “login_result” 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).
This document appears to be written in French. Consider adding “lang="fr"” (or variant) to the “html” start tag.