Never mind! I got some help and figured out I was missing the ajax.php file in my main directory.
That file is part of CORE Zen Cart v1.5.4, and not an issue that would be caused by installing this template..
My Site - Zen Cart & WordPress integration specialist I don't answer support questions via PM. Post add-on support questions in the support thread. The question & the answer will benefit others with similar issues.
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