Null Reference Exception ? :/

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UnityEngine.GameObject.GetComponent () (at C:/BuildAgent/work/7535de4ca26c26ac/Runtime/ExportGenerated/Editor/UnityEngineGameObject.cs:27)
xa.Start () (at Assets/Scripts/xa.cs:30)

I get this error when i go to run my game

Here is my code

using UnityEngine;
using System.Collections;

    public class xa : MonoBehaviour 
    {
    	public static Ball ball;
    	public static AudioManager audioManager;
    	public static ScoreManager scoreManager;
    	
    	public static Player1 player1;
    	public static Player2 player2;
    	//public static Player3 player3;
    	//public static Player4 player4;
    	
    	public static bool gameOver = false;
    	
    	// set to false if game is configured for CTF
    	public static bool letsPlayKeepaway = false; 
    	
    	// layers
    	public const int Team1Goal = 9;
    	public const int Team2Goal = 10;
    	
    	void Start()
    	{
    		// cache these so they can be accessed by other scripts
    		ball = GameObject.FindWithTag("Ball").GetComponent<Ball>();
    		scoreManager = gameObject.GetComponent<ScoreManager>();
    		audioManager = gameObject.GetComponent<AudioManager>();
    		player1 = GameObject.Find("Player1").GetComponent<Player1>();
    		player2 = GameObject.Find("Player2").GetComponent<Player2>();
    		//player3 = GameObject.Find("Player3").GetComponent<Player3>();
    		//player4 = GameObject.Find("Player4").GetComponent<Player4>();
    	}
    }

I dont know what i need to change or set ?
If anyone has some advice?

I have never work on a game/game-prototype that uses network/server, so I have no experience on that. The only thing I am sure of is that Player1 does not exist (yet) when the GameObject.Find() is called in the Start() of the xa.cs.

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By Instantiate()?

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Before that, you have said that I start with an empty scene and when i join the server it creates a player. What do you mean by when I join the server, it creates a player?

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1 Answer

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“Player1” doesn’t exists in your scene, so GameObject.Find("Player1") returns a null and the null created the null-ref exception when you call GetComponent< Player1 > ().

Side Note:
Please format your code properly for your own convenience. I did it for you this once.