Errors:
Attribute “content” not allowed on element “script” at this point.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “img” is missing required attribute “src”.
When the “srcset” attribute has any image candidate string with a width descriptor, the “sizes” attribute must also be present.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
No space between attributes.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
A slash was not immediately followed by “>”.
Attribute “<” not allowed on element “span” at this point.
Attribute “span” not allowed on element “span” at this point.
End tag “div” seen, but there were open elements.
Unclosed element “span”.
Element “div” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Unclosed element “ul”.
Stray end tag “ul”.
Unclosed element “main”.
Stray end tag “div”.
Stray end tag “main”.
Duplicate ID “y”.
Warnings:
The “banner” role is unnecessary for element “header”.
The “main” role is unnecessary for element “main”.
Attribute “<” is not serializable as XML 1.0.
The document is not mappable to XML 1.0 due to two consecutive hyphens in a comment.
The first occurrence of ID “y” was here.
United States US