After both of the clients are connected to the lobby, the host presses the host button and this function is called

    public void StartGame(){
        LoadHubScene(InstanceFinder.ClientManager.Connection);
        LanguageUpdate();
    }

    public void LoadHubScene(NetworkConnection conn){
        lobbyCanvas.SetActive(false);

        BroadcastLoadHub();
        SceneLoadData loadSceneData = new SceneLoadData("Hub"){
            ReplaceScenes = ReplaceOption.All,
        };
        InstanceFinder.SceneManager.LoadGlobalScenes(loadSceneData);

        Debug.Log($"[Server] Transitioning connection {conn.ClientId} to Hub.");
    }

Then, both of the clients are sent to the new scene, which doesn’t have any issues as far as I can tell. The problem appears when it comes to the spawning of the players. Interestingly, the chunks of the world get spawned on the server without an issue, and I only encountered this problem when it came to player spawning. Below is the GO with the script. GO SETUP

and this is the actual script

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using FishNet.Object;
using FishNet;
using FishNet.Object.Synchronizing;
using FishNet.Connection;
using System.Linq;

public class CustomPlayerSpawner : NetworkBehaviour
{
    [SerializeField] GameObject playerGO;
    [SerializeField] GameObject[] spawnPoints;
    bool hasSpawned;

    // Start is called before the first frame update
    public override void OnStartClient()
    {
        base.OnStartClient();
        Spawn(LocalConnection, GetRandomPositionSpawn());
    }

    [ServerRpc(RequireOwnership = false)]
    void Spawn(NetworkConnection connection, Vector3 pos){
        SpawnOnEveryClient(connection, pos);
    }

    [ObserversRpc(ExcludeServer = false, ExcludeOwner = false)]
    void SpawnOnEveryClient(NetworkConnection connection, Vector3 pos){
        Debug.Log($"Spawned for {connection}");
        NetworkObject nob = InstanceFinder.NetworkManager.GetPooledInstantiated(playerGO, pos, Quaternion.identity, true);
        InstanceFinder.ServerManager.Spawn(nob, connection);
        nob.GiveOwnership(connection);
    }


    Vector3 GetRandomPositionSpawn(){
        return spawnPoints[Random.Range(0, spawnPoints.Length)].transform.position;
    }
}

I was expcting for at the very least another Player GO to be spawned, with or without the other player scripts working, but even that didn’t spawn. I have tried working with different setups, including the inbuilt Fishnet spawner script, which also didn’t spawn a second gameObject.