Raycast doesnt work for client in netcode

Hello, I am currently trying to create an online game. I created a script that spawns one object per player when a player spawns. At first I just tried to change the position by using a random vector3 value as the position of the object.

 //Move is called when button is pressed
 Move(){      
       if (NetworkManager.Singleton.IsServer)
             {
                 ...
             }
             else
             {
                 SubmitPositionRequestServerRpc();
             }
 }
         void SubmitPositionRequestServerRpc(ServerRpcParams rpcParams = default)
         {
                     Object = Instantiate(test, transform.position, transform.rotation);
                     Object.GetComponent<NetworkObject>().Spawn();
             changePosition(Object);
         }
         public void changePosition(GameObject Object)
         {
              Object.transform.position = GetRandomPositionOnPlane();
 }
         static Vector3 GetRandomPositionOnPlane()
         {
             return new Vector3(Random.Range(-3f, 3f), 1f, Random.Range(-3f, 3f));
         }

It worked for the client and also for the host. After that, I wanted Object to be permanently where the mouse is. For this I called the changePosition() function in the update function so that the object permanently changes its position. That also worked for the host and the client. But when I added this code to the changePosition() function:

             if (mainCamera == null)
             {
                 mainCamera = GameObject.FindGameObjectWithTag("MainCamera").GetComponent<Camera>();
             }
             Ray ray = mainCamera.ScreenPointToRay(Input.mousePosition);
             if (Physics.Raycast(ray, out RaycastHit raycastHit, float.MaxValue/*, layerMask*/))
             {
                 /*Position.Value*/
                 Object.transform.position = raycastHit.transform.position;
             }

it only worked on the host. This code is supposed to change the object's position to the mouse position. The object has gone to the host's mouse position and when a client is connected, the object has also gone from the client to the host's mouse position. But I want the object from the client to only go where the "mouse" from the client is.

Since I've been struggling with this problem for a few days and couldn't find a solution, I hope someone here can help me.