_satellite.__registerScript is not a function error

We are migrating from Signal to Launch. We had set up rules and migrated all script libraries. We have added Launch code snippet to the head tag of our page.

In the console we are getting below error.

_satellite.__registerScript is not a function.

We have tried loading required script libraries to page bottom/page top/window load but noting worked out.

Please help us in resolving this issue.

Note : We have our pages built in People Soft as we were not able to add Launch JS code snippet to the head tag. We have injected it via JS code.

(function() {

var head = document.getElementsByTagName('head')[0];

        var aatagjs = document.createElement("script");

        //aatagjs.async = true;

        aatagjs.src = "//assets.adobedtm.com/" + aaScriptId; //aaScriptId is a viarable holding our Launch Code

        head.appendChild(aatagjs);

    }());