Network.Instantiate crashes my game

So I am not sure what I did but I had this working at one point now it doesn't.

To give an overview of what is going on when a player clicks the join the game it will spawn a prefab owned by that connected user. Here is the code that is called when clicking to join the game:

 if(networkView.isMine){
                 if(PersistantObject.readyplayers == PersistantObject.connectedplayers ){
                     if(GUI.Button(new Rect(230,200, 150, 50), "Join Game")){
                         if(do_once){
                             inLobby = false;
                             networkView.RPC("IncJoinedPlayers", RPCMode.AllBuffered);
                             SpawnPlayer();
                             do_once = false;
                         }//end do_once
                     }//end button
                 }//end readyplayers = connected player
             }//end networkview.ismine

Now here is the code for the "SpawnPlayer()" function that is called:

 private void SpawnPlayer()
     {
         if(networkView.isMine){
             inLobby = false;
             if (PersistantObject.ImAGhost) {
                 Network.Instantiate(prefab_ghost, GhostLocation.transform.position, Quaternion.identity, 0);
             }else{
                 if(chr_number == 1){
                     Network.Instantiate(playerPrefab_ethan, spawnLocation.position, Quaternion.identity, 0);
                 }else if(chr_number == 2){
                     Network.Instantiate(playerPrefab_robot, spawnLocation.position, Quaternion.identity, 0);
                 }else if(chr_number == 3){
                     Network.Instantiate(playerPrefab_goblin, spawnLocation.position, Quaternion.identity, 0);
                 }
             //chr_number = 0;
             networkView.RPC ("IncListCount", RPCMode.AllBuffered);
             }
         }
     }

The "chr_number" is the chosen character in prior menu screens. So it works if I test it by myself but if I test a server and client then it crashes unity and freezes the other that I am testing as soon as I click "Join Game" button.

Any help on this would be amazing. I found some similar issues with network.instantiate on other forums but nothing that can fully answer my question.

Here is a picture of the button that is pressed, its an OnGUI() call: