Mirror TextMeshPro text doesn't synchronize on client - unity3d

Question

I'm trying to get users to see each other's nicknames, but it doesn't work on client.
On server it works fine? but on client texts don't sync. TextMehPro is child of PlayerPrefab
On Client
enter image description here
On Server
enter image description here
This is my network manager
using Mirror;
using TMPro;
public class NetManager : NetworkManager
{
private UserController controller;
public TextMeshPro nickname;
public override void Start()
{
base.Start();
controller = UserController.Shared;
}
private void OnCreateCharacter(NetworkConnectionToClient conn, UserMessage message)
{
var go = Instantiate(playerPrefab);
var user = new User(message);
var tank = go.GetComponent<TankController>();
tank.thisNick.text = user.UserName;
NetworkServer.AddPlayerForConnection(conn, go);
tank.SetUser(user);
}
public override void OnStartServer()
{
base.OnStartServer();
NetworkServer.RegisterHandler<UserMessage>(OnCreateCharacter);
}
public override void OnClientConnect()
{
base.OnClientConnect();
ActivatePLayerSpawn();
}
private void ActivatePLayerSpawn()
{
var user = controller.User;
var message = new UserMessage(user);
NetworkClient.Send(message);
}
}
public struct UserMessage: NetworkMessage
{
public string Name;
public int Coins;
public int Id;
public UserMessage(User u)
{
Name = u.UserName;
Coins = u.Coins;
Id = u.Id;
}
}