Your script name is tracker.js which is not the best name as adblockers/privacy blockers simply block any names with the word track and many other similar names

Your script name is tracker.js which is not the best name as adblockers/privacy blockers simply block any names with the word track and many other similar names. If you name your script something else that is not blocked it would enable it to run, and be valuable to see the errors that users get when they block other js on a page.