Subscribe is deprecated: Use an observer instead of an error callback
RxJS deprecated some signatures of the subscribe method, which might have caused some confusion. The subscribe method itself isn\’t deprecated, only the variant we\’re using is deprecated. So here it looks like See these GitHub issues: https://github.com/ReactiveX/rxjs/pull/4202 https://github.com/ReactiveX/rxjs/issues/4159 /Siva