Errors:
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Element “meta” is missing one or more of the following attributes: “content”, “property”.
Bad value for attribute “src” on element “script”: Illegal character in query: “\” is not allowed.
Element “content” not allowed as child of element “form” in this context. (Suppressing further errors from this subtree.)
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Duplicate ID “o-nas”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Duplicate ID “newsletter”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “https://www.linkedin.com/company/15256176?trk=tyah&trkInfo=clickedVertical:company,clickedEntityId:15256176,idx:3-1-3,tarId:1481117296697,tas:siniat pol” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Saw “<!--” within a comment. Probable cause: Nested comment (not allowed).
Bogus comment.
Warnings:
The “name” attribute is obsolete. Consider putting an “id” attribute on the nearest container instead.
The first occurrence of ID “o-nas” was here.
The first occurrence of ID “newsletter” was here.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The document is not mappable to XML 1.0 due to a trailing hyphen in a comment.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.
Poland PL