Errors:
Bad value “og:http://ogp.me/ns#” for attribute “prefix” on element “html”.
Attribute “itemprop” not allowed on element “meta” at this point.
Bad value “//www.w3.org/2000/svg” for the attribute “xmlns” (only “http://www.w3.org/2000/svg” permitted here).
Attribute “accept” not allowed on element “form” at this point.
Element “img” is missing required attribute “src”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Attribute “autocorrect” not allowed on element “input” at this point.
Attribute “autocapitalize” not allowed on element “input” at this point.
Attribute “required” is only allowed when the input type is “checkbox”, “date”, “datetime-local”, “email”, “file”, “month”, “number”, “password”, “radio”, “search”, “tel”, “text”, “time”, “url”, or “week”.
Duplicate attribute “class”.
Attribute “name” not allowed on element “meta” at this point.
Element “meta” is missing one or more of the following attributes: “itemprop”, “property”.
Element “meta” is missing one or more of the following attributes: “content”, “itemprop”, “property”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Bad value “true” for attribute “async” on element “script”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “navigation” role is unnecessary for element “nav”.
Attribute “xmlns” is not serializable as XML 1.0.
The “main” role is unnecessary for element “main”.
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