Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Duplicate attribute “lang”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
Bad value “el_GR” for attribute “lang” on element “html”: The language subtag “el_gr” is not a valid language subtag.
Bad value “application/xhtml+xml; charset=UTF-8” for attribute “content” on element “meta”: The legacy encoding declaration did not start with “text/html;”.
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.
Bad value “expires” for attribute “http-equiv” on element “meta”.
Bad value “cache-control” for attribute “http-equiv” on element “meta”.
Bad value “pragma” for attribute “http-equiv” on element “meta”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Bad value “favorites icon” for attribute “rel” on element “link”: The string “favorites” is not a registered keyword.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Attribute “alt” not allowed on element “div” at this point.
Named character reference was not terminated by a semicolon. (Or “&” should have been escaped as “&”.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
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