Errors:
Bad value “en_US” for attribute “lang” on element “html”: The language subtag “en_us” is not a valid language subtag.
A “charset” attribute on a “meta” element found after the first 1024 bytes.
A “meta” element with an “http-equiv” attribute whose value is “X-UA-Compatible” must have a “content” attribute with the value “IE=edge”.
Bad value “lazy-stylesheet” for attribute “rel” on element “link”: The string “lazy-stylesheet” is not a registered keyword.
Bad value “https://fonts.googleapis.com/css?family=Open Sans:300,400,700” for attribute “href” on element “link”: Illegal character in query: space is not allowed.
Attribute “priority” not allowed on element “script” at this point.
Stray end tag “input”.
An “img” element must have an “alt” attribute, except under certain conditions. For details, consult guidance on providing text alternatives for images.
Element “style” not allowed as child of element “div” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “target” on element “a”: Browsing context name must be at least one character long.
Attribute “elid” not allowed on element “div” at this point.
Duplicate ID “col-center”.
Duplicate attribute “class”.
Warnings:
Consider avoiding viewport values that prevent users from resizing documents.
The first occurrence of ID “col-center” was here.
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).
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