Custom Network Manager won't connect 2 games on same machine in LAN

Unity Engine
1

So I started looking to make my own Custom Network Manager and this is what I came up with:

using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEngine.Networking;
using UnityEngine.SceneManagement;
using UnityEngine.UI;
using TMPro;

public class CustomNetworkManager : NetworkManager {

    public void StartHosting()
    {
        SetPort();
        NetworkManager.singleton.StartHost();
    }

    public void JoinGame()
    {
        SetIPAddress();
        SetPort();
        NetworkManager.singleton.StartClient();
    }

    private void SetIPAddress()
    {
        string ipAddress = GameObject.Find("InputFieldAddress").transform.Find("Text Area").transform.Find("Text").GetComponent<TMP_Text>().text;
        NetworkManager.singleton.networkAddress = ipAddress;
    }

    void SetPort()
    {
        NetworkManager.singleton.networkPort = 7777;
    }

    private void OnLevelWasLoaded(int level)
    {
        if (level == 0)
            SetupMainSceneButtons();
        else
            SetupOtherSceneButtons();
    }

    private void loadMainMenu()
    {
        GameObject menu1 = MyUtils.FindIncludingInactive("Multiplayer Menu");
        GameObject menu2= MyUtils.FindIncludingInactive("Options Menu");

        if (menu1.active)
            menu1.SetActive(false);
        else
            menu2.SetActive(false);

        GameObject menu = MyUtils.FindIncludingInactive("Main Menu");
        menu.SetActive(true);
    }

    private void loadOptionsMenu()
    {
        GameObject menu = MyUtils.FindIncludingInactive("Main Menu");
        menu.SetActive(false);

        menu = MyUtils.FindIncludingInactive("Options Menu");
        menu.SetActive(true);
    }

    private void loadMultiplayerMenu()
    {
        GameObject menu = MyUtils.FindIncludingInactive("Main Menu");
        menu.SetActive(false);

        menu = MyUtils.FindIncludingInactive("Multiplayer Menu");
        menu.SetActive(true);

        GameObject.Find("Host Game Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Host Game Button").GetComponent<Button>().onClick.AddListener(StartHosting);

        GameObject.Find("Join Game Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Join Game Button").GetComponent<Button>().onClick.AddListener(JoinGame);

        GameObject.Find("Back Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Back Button").GetComponent<Button>().onClick.AddListener(loadMainMenu);
    }

    private void SetupMainSceneButtons()
    {
        GameObject menu = MyUtils.FindIncludingInactive("Main Menu");
        menu.SetActive(true);

        menu = MyUtils.FindIncludingInactive("Multiplayer Menu");
        menu.SetActive(false);

        menu = MyUtils.FindIncludingInactive("Options Menu");
        menu.SetActive(false);


        GameObject.Find("Multiplayer Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Multiplayer Button").GetComponent<Button>().onClick.AddListener(loadMultiplayerMenu);

        GameObject.Find("Options Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Options Button").GetComponent<Button>().onClick.AddListener(loadOptionsMenu);

        GameObject.Find("Quit Button").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("Quit Button").GetComponent<Button>().onClick.AddListener(loadMainMenu);
    }

    private void SetupOtherSceneButtons()
    {
        GameObject menu = MyUtils.FindIncludingInactive("NetworkButton");
        menu.SetActive(true);

        GameObject.Find("ButtonDisconnect").GetComponent<Button>().onClick.RemoveAllListeners();
        GameObject.Find("ButtonDisconnect").GetComponent<Button>().onClick.AddListener(NetworkManager.singleton.StopHost);
    }
}

Now, I went and tried to test my script and I found that I can’t connect 2 games via LAN (Which is the only option until now). I can LAN Host fine both on a standalone client or when pressing Play on Unity but I cannot for the life of me connect from either side.

I get DNS Resolution Failed: 11001 and UNet Client Error Connect Error: 11

All the other threads I have found have not helped me troubleshoot or solve this problem.

2

Any help? (Not sure if bumping is allowed)