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 in Angular-5, service file was not imported from which i was accessing the method and subscribing the data.After importing service file it worked fine.