upd

Assets/scenes/minimal.scene

@@ -6,6 +6,7 @@
       "Flags": 0,
       "Name": "NetworkManager",
       "Enabled": true,
+      "NetworkMode": 0,
       "Components": [
         {
           "__type": "Sandbox.SceneInformation",
@@ -16,7 +17,7 @@
         },
         {
           "__type": "Sandbox.KPTLConnect",
-          "__guid": "f04f8f05-a397-4270-a980-0af80440178e",
+          "__guid": "895b0f93-287e-4607-808e-6ce5bdbb5c05",
           "PlayerPrefab": {
             "_type": "gameobject",
             "prefab": "prefabs/player.prefab"

Code/KPTLConnect.cs

@@ -25,9 +25,9 @@ public sealed class KPTLConnect : Component, Component.INetworkListener
 			LoadingScreen.Title = "Creating Lobby";
 			await Task.DelayRealtimeSeconds( 0.1f );
 			Networking.CreateLobby();
-		} else
+		} else if (!StartServer && !Networking.IsActive)
 		{
-			string lobbyId = await Http.RequestStringAsync( "https://sbox.koptilnya.xyz/string" );
+			string lobbyId = await Http.RequestStringAsync( "https://sbox.koptilnya.xyz" );
 			Networking.Connect(lobbyId);
 		}
 	}
@@ -63,7 +63,9 @@ public sealed class KPTLConnect : Component, Component.INetworkListener
 		
 		var lobbyList = await Networking.QueryLobbies();
 		
-		await Http.RequestAsync( $"https://sbox.koptilnya.xyz/string?text={lobbyList[0].LobbyId}", "POST" );
+		await Http.RequestAsync( $"https://sbox.koptilnya.xyz/?text={lobbyList[0].LobbyId}", "POST" );
+		
+		Log.Info( "Lobby ID updated successfully!" );
 	}
 
 	/// <summary>

kakozuzo_2.sbproj

@@ -24,6 +24,6 @@
     "CsProjName": "",
     "StartupScene": "scenes/minimal.scene",
     "MapStartupScene": "scenes/minimal.scene",
-    "LaunchMode": "Launcher"
+    "LaunchMode": "Normal"
   }
 }