Errors:
A “link” element with a “sizes” attribute must have a “rel” attribute that contains the value “icon” or the value “apple-touch-icon”.
The element “button” must not appear as a descendant of the “a” element.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Bad value “ic_close_black_24px-(5)” for attribute “id” on element “g”: Not a valid XML 1.0 name.
Attribute “type” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
No space between attributes.
Duplicate attribute “id”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Duplicate ID “login”.
A document must not include more than one “autofocus” attribute.
Duplicate ID “password”.
Duplicate ID “submitLogin”.
Bad value “x-template” for attribute “type” on element “script”: Subtype missing.
Bad value “” for attribute “aria-labelledby” on element “div”: An IDREFS value must contain at least one non-whitespace character.
Duplicate ID “subscribe”.
Duplicate ID “submit”.
Warnings:
The first occurrence of ID “login” was here.
The first occurrence of ID “password” was here.
The first occurrence of ID “submitLogin” was here.
Empty heading.
The first occurrence of ID “subscribe” was here.
The first occurrence of ID “submit” was here.
This document appears to be written in Polish but the “html” start tag has “lang="en"”. Consider using “lang="pl"” (or variant) instead.
Poland PL