Errors:
Almost standards mode doctype. Expected “<!DOCTYPE html>”.
Bad value “https://www.w3.org/1999/xhtml” for the attribute “xmlns” (only “http://www.w3.org/1999/xhtml” permitted here).
When the attribute “xml:lang” in no namespace is specified, the element must also have the attribute “lang” present with the same value.
The “profile” attribute on the “head” element is obsolete.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.
Attribute “itemprop” not allowed on element “link” at this point.
Attribute “itemprop” not allowed on element “meta” at this point.
Element “div” not allowed as child of element “progress” in this context. (Suppressing further errors from this subtree.)
Bad value “25px” for attribute “height” on element “img”: Expected a digit but saw “p” instead.
Bad value “navigation” for attribute “role” on element “ul”.
Bad value “100%” for attribute “width” on element “img”: Expected a digit but saw “%” instead.
No “p” element in scope but a “p” end tag seen.
Element “p” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Attribute “rehref” not allowed on element “a” at this point.
Stray end tag “div”.
Bad value “tel:+49 173 4298898” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
End tag “a” violates nesting rules.
No “small” element in scope but a “small” end tag seen.
Bad value “follow” for attribute “rel” on element “a”: The string “follow” is not a registered keyword.
Element “script” must not have attribute “async” unless attribute “src” is also specified or unless attribute “type” is specified with value “module”.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Attribute “xmlns” is not serializable as XML 1.0.
The “type” attribute for the “style” element is not needed and should be omitted.
Consider avoiding viewport values that prevent users from resizing documents.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Article lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all articles.
The “type” attribute is unnecessary for JavaScript resources.
Consider using the “h1” element as a top-level heading only (all “h1” elements are treated as top-level headings by many screen readers and other tools).
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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