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morr0350 (3) [Avatar] Offline
If you have the latest Elm 0.19 and elm/http 2.0.0, the HTTP request code needs to be updated in InitialCommand on page 106 to:

initialCommand: Cmd Msg
initialCommand =
    { url = "", expect = Http.expectString GotPhotos }
    |> Http.get

And then, later in the chapter, page 116, when the list decoder is added to expect a List of decoded Photos from JSON, the updated code would be:

initialCommand: Cmd Msg
initialCommand =
        { url = ""
        , expect = Http.expectJson GotPhotos (list photoDecoder)