Errors:
Start tag “head” seen but an element of the same type was already open.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Bad value “page sb-site” for attribute “id” on element “div”: An ID must not contain whitespace.
Attribute “ezaw” not allowed on element “span” at this point.
Attribute “ezah” not allowed on element “span” at this point.
Attribute “adunitname” not allowed on element “div” at this point.
Element “div” not allowed as child of element “span” in this context. (Suppressing further errors from this subtree.)
Duplicate ID “sidemenu_show”.
Element “script” must not have attribute “async” unless attribute “src” is also specified.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
No space between attributes.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The “banner” role is unnecessary for element “header”.
The “navigation” role is unnecessary for element “nav”.
The “main” role is unnecessary for element “main”.
The “contentinfo” role is unnecessary for element “footer”.
The first occurrence of ID “sidemenu_show” was here.
The “border” attribute is obsolete. Consider specifying “img { border: 0; }” in CSS instead.
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