upd

Assets/Scenes/Menu/Menu.unity

@@ -1755,6 +1755,8 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 888381d2f37742ae809685fc98b89251, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  NetworkManager: {fileID: 1495427289}
+  externalIP: localhost
 --- !u!114 &678043785
 MonoBehaviour:
   m_ObjectHideFlags: 0
@@ -1779,7 +1781,6 @@ GameObject:
   - component: {fileID: 685655170}
   - component: {fileID: 685655169}
   - component: {fileID: 685655168}
-  - component: {fileID: 685655172}
   m_Layer: 11
   m_Name: Camera
   m_TagString: MainCamera
@@ -1905,19 +1906,6 @@ Transform:
   m_Children: []
   m_Father: {fileID: 0}
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
---- !u!114 &685655172
-MonoBehaviour:
-  m_ObjectHideFlags: 0
-  m_CorrespondingSourceObject: {fileID: 0}
-  m_PrefabInstance: {fileID: 0}
-  m_PrefabAsset: {fileID: 0}
-  m_GameObject: {fileID: 685655167}
-  m_Enabled: 1
-  m_EditorHideFlags: 0
-  m_Script: {fileID: 11500000, guid: fbc9d11c053e4cf9b3f111038086b924, type: 3}
-  m_Name: 
-  m_EditorClassIdentifier: 
-  networkManager: {fileID: 1495427289}
 --- !u!1 &753208638
 GameObject:
   m_ObjectHideFlags: 0
@@ -3243,7 +3231,7 @@ MonoBehaviour:
   offlineScene: 
   onlineScene: Assets/Scenes/Menu/Menu.unity
   transport: {fileID: 1495427290}
-  networkAddress: localhost
+  networkAddress: oscar.koptilnya.xyz
   maxConnections: 100
   disconnectInactiveConnections: 0
   disconnectInactiveTimeout: 60

Assets/Scripts/Network/HttpRequests.cs

@@ -4,14 +4,17 @@ using System.Net;
 using System.Net.Sockets;
 using UnityEngine;
 using UnityEngine.Networking;
+using UnityEngine.Serialization;
 
 namespace Network
 {
     public class HttpRequests : MonoBehaviour
     {
+        public CustomNetworkManager NetworkManager;
+        
         private string baseUrl = "https://kotpilnya.xyz/slowpoker/api/";
         public Dictionary<string, string> ServerListResponse;
-        private string _externalIP = "localhost";
+        public string externalIP = "localhost";
         
         [System.Serializable] public class ServerInfo
         {
@@ -28,7 +31,7 @@ namespace Network
             ServerInfo serverInfo = new ServerInfo
             {
                 name = "Oscar",
-                address = _externalIP
+                address = externalIP
             };
 
             string jsonData = JsonUtility.ToJson(serverInfo);
@@ -51,8 +54,9 @@ namespace Network
             }
             else
             {
-                _externalIP = request.downloadHandler.text;
+                externalIP = request.downloadHandler.text;
-                Debug.Log("External IP Address: " + _externalIP);
+                // NetworkManager.networkAddress = _externalIP;
+                Debug.Log("External IP Address: " + externalIP);
             }
         }
         

Assets/Scripts/Network/JoinCollider.cs

@@ -1,15 +1,22 @@
 using System.Collections;
 using System.Collections.Generic;
+using Network;
 using UnityEngine;
 
 public class JoinCollider : MonoBehaviour
 {
     public CustomNetworkManager networkManager;
     public GameObject door;
+    private HttpRequests _httpRequests;
+
+    void Start()
+    {
+        _httpRequests = transform.GetComponentInParent<HttpRequests>();
+    }
     private void OnTriggerEnter(Collider other)
     {
         door.SetActive(true);
-        // networkManager.networkAddress = "localhost";
+        // networkManager.networkAddress = _httpRequests.ServerListResponse[0];
         networkManager.StartClient();
     }
 }