hi allam getting this error

Hi Jantzen, looks like this is an issue occurring at safari browser and mobile devices. the same code works fine on localhost (for both safari, mobile etc) but not on the main website,.Thanks,Sumit 

I am doing milestone youtube video tracking through DTM. It is perfectly working fine on a desktop browser & on an android (chrome and Samsung's native) browsers. However, youtube milestone tracking doesn't work on an iOS like iphone safari browser.could you provide me any clue on how to fix this is...