I'm getting the following error only on production, the production env uses PHP 5.5.17 and my dev env uses 5.5.30 so I don't think that is an issue, dev env is Ubuntu and I think prod is Windows. I'm not much of a PHP guy so any help is welcomed.
PHP Fatal error: Class 'Handlebars\\Handlebars' not found
require get_template_directory() .'/handlebars/Autoloader.php';
Handlebars\Autoloader::register();
use Handlebars\Handlebars;
$handlebars = new Handlebars(handlebars_settings());