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Error: Uncaught (in promise): TypeError: rxjs_1.fromEvent is not a function

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what should I do this error happened? I find the where error happen ,it in vg-fullscreen-api.js file in the package, Error: Uncaught (in promise): TypeError: rxjs_1.fromEvent is not a function...

I goes just as document say,nothing different,but the error below happen! I don't knnown what wrong with my code. Error: Uncaught (in promise): TypeError: Object(...) is not a function TypeError:...