Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
Attribute “"” is not serializable as XML 1.0.
Attribute “xmlns” is not serializable as XML 1.0.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
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).
Errors:
No space between attributes.
Saw “"” when expecting an attribute name. Probable cause: “=” missing immediately before.
Attribute “"” not allowed on element “a” at this point.
Element “span” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Saw “<?”. Probable cause: Attempt to use an XML processing instruction in HTML. (XML processing instructions are not supported in HTML.)
Stray doctype.
Bad value “” for the attribute “xmlns” (only “http://www.w3.org/2000/svg” permitted here).
Bad value “” for attribute “action” on element “form”: Must be non-empty.
Duplicate attribute “required”.
Bad value “” for attribute “rows” on element “textarea”: The empty string is not a valid positive integer.
Bad value “” for attribute “cols” on element “textarea”: The empty string is not a valid positive integer.
Bad value “https://t.…” for attribute “href” on element “a”: Invalid host: A label or domain name contains disallowed characters..
Bad value “tel:020 8780 9383” for attribute “href” on element “a”: Illegal character in scheme data: space is not allowed.
The “for” attribute of the “label” element must refer to a non-hidden form control.
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