ClientRpc doesnt call on local client

I want to make chat, but this script doesn't work. (Im new at networking, so sry if im noob :D) using UnityEngine; using UnityEngine.Networking; using UnityEngine.UI;

 public class ChatManager : NetworkBehaviour {
  
     string lastMessage;
  
     public Text chat;
     public Text t;
     public Button sButton;
     void Start()
     {
         if (isLocalPlayer)
         {
             t = GameObject.Find("InputFieldText").GetComponent<Text>();
             sButton = GameObject.Find("SendButton").GetComponent<Button>();
             sButton.onClick.AddListener(() => SendMessage());
             chat = GameObject.Find("ChatText").GetComponent<Text>();
         }
     }
     public void SendMessage()
     {
         lastMessage = t.text;
         Debug.Log("Sended message : " + lastMessage);
         t.text = string.Empty;
         CmdSendMessage(lastMessage);
     }
     [Command]
     void CmdSendMessage(string msg)
     {
         RpcRecieveMessage("Test : " + msg);
     }
  
     [ClientRpc]
     void RpcRecieveMessage(string msg)
     {
         if (isLocalPlayer)
         {
             Debug.Log("Got message : " + msg);
             chat.text = chat.text + "\n" + msg;
         }
     }
 }

So, when host sends message to client, nothing happens. Same on client-host side. I think that's because of RPC not calling on local player. Idk how to fix it, help me pls :)