Thanks so much for your response Ahmad @ahmedkaludi
I am using plugins for everything. I have very limited knowledge about coding.
That code is for Google ANalytics. I entered Google Analytics ID in your plugin settings. I am not sure what is sitewit.com and from where its coming. I have not made any changes recently, everything was configured since starting and all AMP pages were showing ok earlier. Even google says valid AMP during testing.
I am using monster Insight as well and Sumo for sharing and subscriber window. If this will helpful.
Please help me on this as i am loosing mobile traffic share post this error.