Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
A document must not include more than one “meta” element with a “http-equiv” attribute whose value is “content-type”.
Bad value “tel: +48 61 626 20 22” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “javascript:void();” for attribute “href” on element “a”: syntax error
Duplicate ID “logo”.
Duplicate ID “content”.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “main-sidebar-container”.
Duplicate ID “main”.
No “p” element in scope but a “p” 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.
End tag “h4” seen, but there were open elements.
Unclosed element “span”.
The “aria-labelledby” attribute must point to an element in the same document.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “logo” was here.
The “navigation” role is unnecessary for element “nav”.
Empty heading.
The first occurrence of ID “content” was here.
The first occurrence of ID “main-sidebar-container” was here.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “main” was here.
Poland PL