Errors:
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Stray end tag “meta”.
End tag “p” seen, but there were open elements.
Unclosed element “a”.
No “a” element in scope but a “a” end tag seen.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Bad value “https://www.facebook.com/tr?id=1218755148154340&ev=PageView&noscript=1&cd[domain]=warsawtour.pl” for attribute “src” on element “img”: Illegal character in query: “[” is not allowed.
Bad value “https://www.facebook.com/tr?id=1218755148154340&ev=GeneralEvent&noscript=1&cd[post_type]=page&cd[content_name]=Strona+g%C5%82%C3%B3wna&cd[post_id]=11&cd[domain]=warsawtour.pl” for attribute “src” on element “img”: Illegal character in query: “[” is not allowed.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “id” on element “div”: An ID must not be the empty string.
Warnings:
Attribute “1” is not serializable as XML 1.0.
Attribute “2” is not serializable as XML 1.0.
Attribute “3” is not serializable as XML 1.0.
Attribute “4” is not serializable as XML 1.0.
Attribute “5” is not serializable as XML 1.0.
Attribute “6” is not serializable as XML 1.0.
Attribute “7” is not serializable as XML 1.0.
Attribute “8” is not serializable as XML 1.0.
Attribute “9” is not serializable as XML 1.0.
Attribute “10” is not serializable as XML 1.0.
Attribute “11” is not serializable as XML 1.0.
Attribute “12” is not serializable as XML 1.0.
Attribute “13” is not serializable as XML 1.0.
Attribute “14” is not serializable as XML 1.0.
Attribute “15” is not serializable as XML 1.0.
Attribute “16” is not serializable as XML 1.0.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
Empty heading.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Poland PL