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

So I followed a couple of tutorials and made a custom network manager script:

 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;
     }
 
     void OnEnable()
     {
         //Tell our "OnLevelLoaded" function to start listening for a scene change as soon as this script is enabled.
         SceneManager.sceneLoaded += OnLevelLoaded;
     }
 
     private void OnDisable()
     {
         //Tell our "OnLevelLoaded" function to stop listening for a scene change as soon as this script is disabled.
         SceneManager.sceneLoaded -= OnLevelLoaded;
     }
 
     private void OnLevelLoaded(Scene scene, LoadSceneMode mode)
     {
         //This is the delegate function to handle scene loading as to create the Listeners on the UI buttons.
         if (scene.name == "Main Menu")
             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);
         GameObject.Find("ButtonDisconnect").GetComponent<Button>().onClick.AddListener(NetworkServer.Reset);
     }
 }

Problem is, when I run 2 instances of the game I cannot connect a client to the host on the same machine. I can host just fine, but I cannot connect to each other.

I get 2 errors on my log: DNS Resolution failed: 11001 UNet Client Error Connect Error: 11

I have tried disabling firewall, changing where my network manager is and all of the steps in all other topics about this problem but have yet to find a solution.

Can anyone help me troubleshoot?