Objects instantiated by the host show on all clients but client objects don't show on host.

Hello, I have this issue where if the host of the room shoots a bullet, it shows on all clients, but when a client shoots a bullet it only shows for them.

Here is my code:

 void Update()
 {
     if (Input.GetKeyDown(KeyCode.Mouse0))
     {
         InvokeRepeating("ShootBullet", 0, 1 / rateOfFire);
     }
     if(Input.GetKeyUp(KeyCode.Mouse0))
     {
         CancelInvoke("ShootBullet");
     }
 }
 [Client]
 void ShootBullet()
 {
     if(!isLocalPlayer)
     {
         return;
     }
     Vector2 mousePosition = new Vector2(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y);
     Vector3 difference = new Vector3(mousePosition.x, mousePosition.y, 0) - transform.position;
     difference.Normalize();
     float rotZ = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;

     GameObject _bullet = Instantiate(bullet, transform.position, Quaternion.Euler(0, 0, rotZ));

     //_bullet.GetComponent<Rigidbody2D>().AddForce(_bullet.transform.right * 10);
     _bullet.transform.position += _bullet.transform.right * 10;

     NetworkServer.Spawn(_bullet);

     FindObjectOfType<AudioManager>().Play("Shoot");
 }
 //[Command]
 //void CmdShootBullet()
 //{
 //    InvokeRepeating("RpcShootBullet", 0, 1/rateOfFire);
 //}

Any help please? I feel like it's something wrong with the paramaters ([ClientRpc], [Command], etc)

EDIT: I think I have found the issue, I have updated my code:

public GameObject bullet; public float rateOfFire = 0.10f;

 void Update()
 {
     if (Input.GetKeyDown(KeyCode.Mouse0))
     {
         InvokeRepeating("CmdShootBullet", 0, 1 / rateOfFire);
     }
     if(Input.GetKeyUp(KeyCode.Mouse0))
     {
         CancelInvoke("CmdShootBullet");
     }
 }
 [Command]
 void CmdShootBullet()
 {
     if(!isLocalPlayer)
     {
         return;
     }

     if(!NetworkServer.active)
     {
         Debug.LogError("PlayerShoot: No Network Server Active");
         return;
     }
     Vector2 mousePosition = new Vector2(Camera.main.ScreenToWorldPoint(Input.mousePosition).x, Camera.main.ScreenToWorldPoint(Input.mousePosition).y);
     Vector3 difference = new Vector3(mousePosition.x, mousePosition.y, 0) - transform.position;
     difference.Normalize();
     float rotZ = Mathf.Atan2(difference.y, difference.x) * Mathf.Rad2Deg;

     GameObject _bullet = Instantiate(bullet, transform.position, Quaternion.Euler(0, 0, rotZ));

     NetworkServer.Spawn(_bullet);

     _bullet.transform.position += _bullet.transform.right * 5.5f;
     _bullet.GetComponent<Rigidbody2D>().velocity = _bullet.transform.right * _bullet.GetComponent<Bullet>().speed;

     FindObjectOfType<AudioManager>().Play("Shoot");
 }

I was getting an error on the non-host client saying something along the lines of "Can't spawn objects without the NetworkServer active, however I wouldn't get it on the host. If anyone can please help it would be much appreciated.

Thanks.