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 “” for attribute “id” on element “header”: An ID must not be the empty string.
Stray end tag “span”.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
Duplicate attribute “type”.
Duplicate attribute “class”.
Duplicate ID “inputEmail”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “bg”.
Duplicate ID “Fill-1”.
Duplicate ID “Stroke-2”.
Duplicate ID “Fill-4”.
Duplicate ID “Stroke-5”.
Duplicate ID “Fill-7”.
Duplicate ID “Stroke-8”.
Duplicate ID “Fill-10”.
Duplicate ID “Stroke-11”.
Duplicate ID “Fill-17”.
Duplicate ID “Stroke-18”.
Duplicate ID “Fill-19”.
Duplicate ID “Stroke-20”.
Duplicate ID “Fill-21”.
Duplicate ID “Stroke-22”.
Duplicate ID “Fill-23”.
Duplicate ID “Stroke-24”.
Duplicate ID “Fill-25”.
Duplicate ID “Stroke-26”.
Duplicate ID “Stroke-32”.
Duplicate ID “Fill-34”.
Duplicate ID “Stroke-35”.
Duplicate ID “Stroke-39”.
Duplicate ID “Stroke-41”.
Duplicate ID “Fill-42”.
Duplicate ID “Stroke-43”.
Duplicate ID “Stroke-47”.
Duplicate ID “Stroke-49”.
Duplicate ID “Fill-50”.
Duplicate ID “Stroke-51”.
Duplicate ID “Stroke-53”.
Duplicate ID “Fill-12”.
Duplicate ID “Fill-14”.
The “align” attribute on the “div” element is obsolete. Use CSS instead.
Attribute “for” not allowed on element “input” at this point.
The “for” attribute of the “label” element must refer to a non-hidden form control.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The “form” role is unnecessary for element “form”.
The first occurrence of ID “inputEmail” was here.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
The first occurrence of ID “bg” was here.
The first occurrence of ID “Fill-1” was here.
The first occurrence of ID “Stroke-2” was here.
The first occurrence of ID “Fill-4” was here.
The first occurrence of ID “Stroke-5” was here.
The first occurrence of ID “Fill-7” was here.
The first occurrence of ID “Stroke-8” was here.
The first occurrence of ID “Fill-10” was here.
The first occurrence of ID “Stroke-11” was here.
The first occurrence of ID “Fill-17” was here.
The first occurrence of ID “Stroke-18” was here.
The first occurrence of ID “Fill-19” was here.
The first occurrence of ID “Stroke-20” was here.
The first occurrence of ID “Fill-21” was here.
The first occurrence of ID “Stroke-22” was here.
The first occurrence of ID “Fill-23” was here.
The first occurrence of ID “Stroke-24” was here.
The first occurrence of ID “Fill-25” was here.
The first occurrence of ID “Stroke-26” was here.
The first occurrence of ID “Stroke-32” was here.
The first occurrence of ID “Fill-34” was here.
The first occurrence of ID “Stroke-35” was here.
The first occurrence of ID “Stroke-39” was here.
The first occurrence of ID “Stroke-41” was here.
The first occurrence of ID “Fill-42” was here.
The first occurrence of ID “Stroke-43” was here.
The first occurrence of ID “Stroke-47” was here.
The first occurrence of ID “Stroke-49” was here.
The first occurrence of ID “Fill-50” was here.
The first occurrence of ID “Stroke-51” was here.
The first occurrence of ID “Stroke-53” was here.
The first occurrence of ID “Fill-12” was here.
The first occurrence of ID “Fill-14” was here.
This document appears to be written in Polish. Consider adding “lang="pl"” (or variant) to the “html” start tag.