Errors:
Obsolete doctype. Expected “<!DOCTYPE html>”.
The “profile” attribute on the “head” element is obsolete. To declare which “meta” terms are used in the document, instead register the names as meta extensions. To trigger specific UA behaviors, use a “link” element instead.
Internal encoding declaration “iso-8859-1” disagrees with the actual encoding of the document (“utf-8”).
Attribute “inhalt” not allowed on element “meta” at this point.
Bad value “text/html; charset=iso-8859-1” for attribute “content” on element “meta”: “iso-8859-1” is not a preferred encoding name. The preferred label for this encoding is “windows-1252”.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “” for attribute “height” on element “img”: The empty string is not a valid non-negative integer.
End tag “h1” seen, but there were open elements.
The “center” element is obsolete. Use CSS instead.
No “p” element in scope but a “p” end tag seen.
Element “li” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
“=” in an unquoted attribute value. Probable causes: Attributes running together or a URL query string in an unquoted attribute value.
End tag “li” seen, but there were open elements.
Unclosed element “em”.
No “em” element in scope but a “em” end tag seen.
The “align” attribute on the “p” element is obsolete. Use CSS instead.
Warnings:
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
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