Roma.de W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “srcset” on element “source”: Must contain one or more image candidate strings.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Attribute “grecaptcha-id” not allowed on element “div” at this point.
Element “div” not allowed as child of element “button” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “type” attribute is unnecessary for JavaScript resources.
The “type” attribute for the “style” element is not needed and should be omitted.
This document appears to be written in German. Consider adding “lang="de"” (or variant) to the “html” start tag.
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