Error: Bad value NextGEN for attribute name on element meta

What It Looks Like

  • Error: Bad value NextGEN for attribute name on element meta: Keyword nextgen is not registered.

    From line 33, column 1; to line 33, column 39

    in. --><meta name='NextGEN' content='1.7.4' />    <s

    Syntax of metadata name:
    A metadata name listed in the HTML specification or listed in the WHATWG wiki. You can register metadata names on the WHATWG wiki yourself.

What The Spec Says

As per the W3, the name attribute on the meta element must be either a defined metadata name or a registered metadata name. The meta name for the NextGEN image gallery has not be registered not.

How To Fix

Easy way: Well, 2 ways depending on the version of NGG you have.
Hard way: Get the NextGEN keyword added to the meta names wiki