Errors:
Start tag “head” seen but an element of the same type was already open.
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”.
Element “meta” is missing one or more of the following attributes: “charset”, “content”, “http-equiv”, “itemprop”, “name”, “property”.
Bad value “//fonts.googleapis.com/css?family=Open+Sans:400,700|Roboto:400,700” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Duplicate ID “coin-container”.
No space between attributes.
Bad value “//pinterest.com/pin/create/button/?url=https://www.masteringthemix.com&description=Mastering The Mix” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “//www.thefancy.com/fancyit?ItemURL=https://www.masteringthemix.com&Title=Mastering The Mix” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “true” for attribute “novalidate” on element “form”.
Element “style” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Warnings:
The “banner” role is unnecessary for element “header”.
Document uses the Unicode Private Use Area(s), which should not be used in publicly exchanged documents. (Charmod C073)
The first occurrence of ID “coin-container” was here.
The “main” role is unnecessary for element “main”.
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).
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
This document appears to be written in English. Consider adding “lang="en"” (or variant) to the “html” start tag.
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