PhotonNetwork.Instantiate() doesn't instantiate the prefab. Only Instantiate() works. Why?

I want a prefab with Line Renderer and PhotonView component to be instantiated on the network when "Fire1" is pressed. To do this I use PhotonNetwork.Instantiate() but it doesn't work. There is no error, the object just doesn't appear. When I use Instantiate() everything works as it should, but I need to send this information over the network.

 // This doesn't instantiate the object
 GameObject effect = (GameObject) PhotonNetwork.Instantiate ("bullet", startPos1, Quaternion.identity, 1);

When I use PhotonNetwork.Instantiate() to instantiate the object I and I try to access it using the code below I get the null reference exception error

 // This gives me null reference exception 
 LineRenderer lr = effect.GetComponent<LineRenderer>();
     
     lr.SetPosition (0, gun1.transform.position);
     lr.SetPosition (1, gun1.transform.position + (gun1.transform.forward * 1000f));