Thank you for the feedback!
One of the errors is a script below the end of the page. It should preceed the close </body> tag or be imported in an external JS file.
</body>
</html>
<script type="text/javascript">(function (d, w) ...
Line 101, <gcse:search></gcse:search>, is an XML 1.0 construct and is invalid in HTML.
@SamA74 found a proper way to format that here
On line 9 in the pinterest meta tag, I think the “description” needs to be in a separate meta tag, but I’m not positive. Can someone else offer a second opinion, please?