Warnings:
The “navigation” role is unnecessary for element “nav”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “type” attribute is unnecessary for JavaScript resources.
Attribute “width"1"” is not serializable as XML 1.0.
Empty heading.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Errors:
Attribute “link” not allowed on element “li” at this point.
Character reference was not terminated by a semicolon.
Bad value “https://twitter.com/home?status=<https://pzkosz.pl/aktualnosci/n/65501/i-sesja-projektu-szkola-trenerow-pzkosz-za-nami.html” for attribute “href” on element “a”: Illegal character in query: “<” is not allowed.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
A “link” element must not appear as a descendant of a “body” element unless the “link” element has an “itemprop” attribute or has a “rel” attribute whose value contains “dns-prefetch”, “modulepreload”, “pingback”, “preconnect”, “prefetch”, “preload”, “prerender”, or “stylesheet”.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “width"1"” not allowed on element “img” at this point.
Poland PL