loadJSON() function error message

Sorry, I don’t know about p5.js but this processing code (JAVA flavor) works:

JSONArray citiesJSONArray; 
String stringCityName;

void setup() {
  size(400, 400);
  citiesJSONArray = loadJSONArray("c1.json");

  for (int x = 0; x < citiesJSONArray.size(); x++) {

    JSONObject oneCityJSONObject = citiesJSONArray.getJSONObject(x); 

    stringCityName = oneCityJSONObject.getString("city");
    println(stringCityName) ;
    // createP(se);
  }
}

void draw() {
  background(120);
  text ("See Direct Window", 44, 44);
}
//

Chrisir