Fatal Exception: java.lang.UnsupportedOperationException: JsonNull for (i in 0 until jsonArray!!.size()) { val stringCode: JsonObject? = jsonArray.get(i).getAsJsonObject() singleUpdateArrayList!!.add( SingleUpdateResp( stringCode!!.get(TagName.AIRWAYBILLNO).getAsString(), stringCode.get(NotificationCompat.CATEGORY_STATUS).getAsString(), stringCode.get(DatabaseHandler.Companion.KEY_SYNC).getAsString() ) ) }