Errors:
The text content of element “script” was not in the required format: Content contains the character sequence “<!--” without a later occurrence of the character sequence “-->”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
End tag “h2” seen, but there were open elements.
End tag “section” seen, but there were open elements.
Unclosed element “div”.
Attribute “allow” not allowed on element “iframe” at this point.
The “frameborder” attribute on the “iframe” element is obsolete. Use CSS instead.
The “sizes” attribute may be specified only if the “srcset” attribute is also present.
Bad value “” for attribute “src” on element “img”: Must be non-empty.
No space between attributes.
Saw “<” when expecting an attribute name. Probable cause: Missing “>” immediately before.
Duplicate attribute “class”.
Attribute “<span” not allowed on element “p” at this point.
Stray end tag “span”.
The “aria-controls” attribute must point to an element in the same document.
The “aria-labelledby” attribute must point to an element in the same document.
Warnings:
The value of attribute “alt” on element “img” from namespace “http://www.w3.org/1999/xhtml” is not in Unicode Normalization Form C.
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “<span” is not serializable as XML 1.0.
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