Tag needs to be rewritten. This works:
<script>(function (w, d, s, l, i) {w[l] = w[l] || [];w[l].push({‘gtm.start’:
new Date().getTime(), event: ‘gtm.js’});var f = d.getElementsByTagName(s)[0];
var j = d.createElement(s);var dl = l != ‘dataLayer’ ? “&l=” + l : ”;j.async = true;j.src =
‘//www.googletagmanager.com/gtm.js?id=’ + i + dl;f.parentNode.insertBefore(j, f);
})(window, document, ‘script’, ‘dataLayer’, ‘GTM-XXXXXX’);</script>
