Errors:
Using the “meta” element to specify the document-wide default language is obsolete. Consider specifying the language on the root element instead.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “allowtransparency” attribute on the “iframe” element is obsolete. Use CSS instead.
Bad value “” for attribute “src” on element “iframe”: Must be non-empty.
Malformed byte sequence: “f1”.
Malformed byte sequence: “c1”.
Malformed byte sequence: “f3”.
Malformed byte sequence: “ed”.
Malformed byte sequence: “e1”.
Malformed byte sequence: “e7”.
Malformed byte sequence: “fc”.
Malformed byte sequence: “e9”.
Malformed byte sequence: “c9”.
Malformed byte sequence: “fa”.
Malformed byte sequence: “e4”.
Malformed byte sequence: “f6”.
Malformed byte sequence: “e3”.
Malformed byte sequence: “d6”.
Malformed byte sequence: “f4”.
Malformed byte sequence: “e5”.
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 document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The “main” role is unnecessary for element “main”.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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