makeJsonRequest response type plain text

Hello, I am begginer with ciq sdk and trying to make this app work with SDK 1.2.1:

https://github.com/danielsiwiec/waypoints-app

This is the code in question:

class Http {

  function _req(url, params, options, callback) {
    if (Comms has :makeWebRequest ) {
			Comms.makeWebRequest(url, params, options, callback);
		} else if (Comms has :makeJsonRequest ) {
			Comms.makeJsonRequest(url, params, options, callback);
		} else {
      throw new Toybox.Lang.Exception("No Communication API");
    }
  }

  function get(url, callback) {

    var options = {
			:method => Comms.HTTP_REQUEST_METHOD_GET,
			:responseType => Comms.HTTP_RESPONSE_CONTENT_TYPE_JSON
		};

    _req(url, null, options, callback);
  }

  function post(url, body, callback) {

    var options = {
			:method => Comms.HTTP_REQUEST_METHOD_POST,
      :responseType => Comms.HTTP_RESPONSE_CONTENT_TYPE_TEXT_PLAIN
		};

    _req(url, body, options, callback);
  }
}

class HashView extends Ui.View {

	var text;
	var http;
	var locationStore;
	var analytics;

	function initialize() {
		View.initialize();
		http = new Http();
		locationStore = new LocationStore();
		analytics = new Analytics();
	}

  function callback(responseCode, data){
		if (responseCode == 200) {
			var lat = data["geo"]["lat"];
			var long = data["geo"]["long"];
			var name = data["name"];
			var location = new Position.Location({:latitude => lat, :longitude => long, :format => :degrees});
			text = "Location\n" + name + "\nadded.";
			try {
				locationStore.save(location, {:name => name});
			} catch (ex) {
				System.println(ex.getErrorMessage());
				text = "No wypt API";
			}
		} else {
			text = "Comms error or \nwrong hash";
		}
  	WatchUi.requestUpdate();
  }

Problem is all response content types are from 1.3.0 onward.

If I remove response type from code app gets wrong response code and goes to this line.

"Comms error or \nwrong hash";

function post(url, body, callback) {

var options = {
:method => Comms.HTTP_REQUEST_METHOD_POST,
:responseType => Comms.HTTP_RESPONSE_CONTENT_TYPE_TEXT_PLAIN
};

_req(url, body, options, callback);
}

Any way around this, using only available makeJsonRequest?

Thanks,

Igor.