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

In my case I mistakely imported Action into my combineEpics, rather than Epic...

Verify all the functions within combine Epics are epic funcitons