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”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “post-476445”.
Duplicate ID “post-480459”.
Duplicate ID “post-478935”.
Duplicate ID “post-470985”.
Duplicate ID “post-477162”.
Duplicate ID “s”.
Duplicate ID “searchsubmit”.
Attribute “value” not allowed on element “span” at this point.
Duplicate ID “nav_menu-2”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The “main” role is unnecessary for element “main”.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The first occurrence of ID “post-476445” was here.
The first occurrence of ID “post-480459” was here.
The first occurrence of ID “post-478935” was here.
The first occurrence of ID “post-470985” was here.
The first occurrence of ID “post-477162” was here.
The value of attribute “style” on element “span” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.
The first occurrence of ID “s” was here.
The first occurrence of ID “searchsubmit” was here.
The first occurrence of ID “nav_menu-2” was here.
This document appears to be written in Polish but the “html” start tag has an empty “lang” attribute. Consider using “lang="pl"” (or variant) instead.
Poland PL