TypeError: You provided an invalid object where a stream was expected. You can provide an Observable, Promise, Array, or Iterable

Question

I am trying to map from a service call but getting an error. Looked at subscribe is not defined in angular 2? and it said that in order to subscribe we need to

Answer 1

This error happened to me @angular 7

You provided an invalid object where a stream was expected. You can provide an Observable, Promise, Array, or Iterable.

The error is actually self-explanatory, it says somewhere in the observable I pass the invalid object. In my case, there was lots of API call but all the calls were failing because of wrong server configuration. I tried to use map, switchMap, or other rxjs operator but the operators are getting undefined objects.

So double-check your rxjs operator inputs.