In my URL, when using http, its working. When using https, its not working. Why? code attached below

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.UI;
using UnityEngine.Networking;
using System.Security.Cryptography.X509Certificates;
using System;

public class Calculation : MonoBehaviour
{

string jsonResult;
Helper.displayBoard[] displayInfo;
public Text E20, E40, E45;
public Text F20, F40, F45;
public Text T20, T40, T45;


// Use this for initialization
void Start()
{
    E20 = GameObject.Find("E20").GetComponentInChildren<Text>();
    E40 = GameObject.Find("E40").GetComponentInChildren<Text>();
    E45 = GameObject.Find("E45").GetComponentInChildren<Text>();
    F20 = GameObject.Find("F20").GetComponentInChildren<Text>();
    F40 = GameObject.Find("F40").GetComponentInChildren<Text>();
    F45 = GameObject.Find("F45").GetComponentInChildren<Text>();
    T20 = GameObject.Find("T20").GetComponentInChildren<Text>();
    T40 = GameObject.Find("T40").GetComponentInChildren<Text>();
    T45 = GameObject.Find("T45").GetComponentInChildren<Text>();

    StartCoroutine(LoadData());
    //displydata();
}

// Update is called once per frame
void Update()
{

}

IEnumerator LoadData()
{
/* string contUrl = “http://961.8.144.142:9080/conslot/getContainerStatistics3d”;*/
string contUrl = “https://961.8.144.142:9080/conslot/getContainerStatistics3d”;

    using (UnityWebRequest www = UnityWebRequest.Get(contUrl))
    {
        yield return www.Send();
        if (www.isNetworkError || www.isHttpError)
        {
            Debug.Log(www.error);
        }
        else
        {
            jsonResult = System.Text.Encoding.UTF8.GetString(www.downloadHandler.data);
            // Debug.Log(jsonResult);
            jsonResult = jsonResult.Split(new string[] { "[" }, System.StringSplitOptions.None)[1];
            jsonResult = jsonResult.Split(new string[] { "]" }, System.StringSplitOptions.None)[0];
            displayInfo = Helper.JsonHelper.getJsonArray<Helper.displayBoard>(jsonResult);
            foreach (Helper.displayBoard displayInf in displayInfo)
            {
                E20.text = displayInf.e20;
                F20.text = displayInf.f20;
                E40.text = displayInf.e40;
                F40.text = displayInf.f40;
                E45.text = displayInf.e45;
                F45.text = displayInf.f45;

                T20.text = (int.Parse(displayInf.e20) + int.Parse(displayInf.f20)).ToString();
                T40.text = (int.Parse(displayInf.e40) + int.Parse(displayInf.f40)).ToString();
                T45.text = (int.Parse(displayInf.e45) + int.Parse(displayInf.f45)).ToString();
            }
        }
    }
}

}

Yes, correct setup only