The Validator is pointing to an incorrect content entry in the meta data entry 'ncc:totalTime'.
<meta name="ncc:sidebars" content="0" />
<meta name="ncc:setInfo" content="1 of 1" />
<meta name="ncc:tocItems" content="11" />
<meta name="ncc:totalTime" content="00:04-18" />
<meta name="dc:source" content="None" scheme="ISBN" />
<meta name="dc:subject" content="None" scheme="keyword" />
<meta name="ncc:depth" content="1" />
This error is not too obvious, but there is a hyphen between 04 and 18 in the reported total time. The format required is a colon.