Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
Stray end tag “script”.
Bad start tag in “img” in “head”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Stray end tag “noscript”.
Stray end tag “head”.
Start tag “body” seen but an element of the same type was already open.
The element “button” must not appear as a descendant of the “a” element.
No “p” element in scope but a “p” end tag seen.
Attribute “height” not allowed on element “a” at this point.
Bad value “4077” for attribute “rel” on element “div”: The string “4077” is not an absolute URL.
Bad value “4075” for attribute “rel” on element “div”: The string “4075” is not an absolute URL.
Bad value “4076” for attribute “rel” on element “div”: The string “4076” is not an absolute URL.
Bad value “4073” for attribute “rel” on element “div”: The string “4073” is not an absolute URL.
Bad value “4074” for attribute “rel” on element “div”: The string “4074” is not an absolute URL.
Bad value “4072” for attribute “rel” on element “div”: The string “4072” is not an absolute URL.
Bad value “4071” for attribute “rel” on element “div”: The string “4071” is not an absolute URL.
Bad value “4070” for attribute “rel” on element “div”: The string “4070” is not an absolute URL.
Bad value “4069” for attribute “rel” on element “div”: The string “4069” is not an absolute URL.
Bad value “4068” for attribute “rel” on element “div”: The string “4068” is not an absolute URL.
Bad value “4067” for attribute “rel” on element “div”: The string “4067” is not an absolute URL.
Bad value “4066” for attribute “rel” on element “div”: The string “4066” is not an absolute URL.
Bad value “4063” for attribute “rel” on element “div”: The string “4063” is not an absolute URL.
Bad value “4065” for attribute “rel” on element “div”: The string “4065” is not an absolute URL.
Bad value “4061” for attribute “rel” on element “div”: The string “4061” is not an absolute URL.
Bad value “4062” for attribute “rel” on element “div”: The string “4062” is not an absolute URL.
Bad value “4060” for attribute “rel” on element “div”: The string “4060” is not an absolute URL.
Bad value “4059” for attribute “rel” on element “div”: The string “4059” is not an absolute URL.
Bad value “4058” for attribute “rel” on element “div”: The string “4058” is not an absolute URL.
Bad value “4057” for attribute “rel” on element “div”: The string “4057” is not an absolute URL.
Bad value “4056” for attribute “rel” on element “div”: The string “4056” is not an absolute URL.
Bad value “4055” for attribute “rel” on element “div”: The string “4055” is not an absolute URL.
Bad value “4054” for attribute “rel” on element “div”: The string “4054” is not an absolute URL.
Bad value “4052” for attribute “rel” on element “div”: The string “4052” is not an absolute URL.
Bad value “4053” for attribute “rel” on element “div”: The string “4053” is not an absolute URL.
Warnings:
The “type” attribute for the “style” element is not needed and should be omitted.
The “type” attribute is unnecessary for JavaScript resources.
The “language” attribute on the “script” element is obsolete. You can safely omit it.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.