Object reference not set to an instance of an object?

Unity Engine
1

Hi guys, I came up with this problem. I am using TairaGames’ point to click tutorial.

using UnityEngine;
using System.Collections;

public class SendInfo : MonoBehaviour
{

 
    void Start()
    {

    }


    void Update()
    {

        bool RMB = Input.GetMouseButtonDown(0);

        if (RMB)
        {

            RaycastHit hit;
            Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);

            if (Physics.Raycast(ray, out hit) && hit.transform.tag == "Ground")
            {
                this.GetComponent<PhotonView>().RPC("RecievedMove", PhotonTargets.All, hit.point);
            }


        }

    }
}

There error is:
NullReferenceException: Object reference not set to an instance of an object SendInfo.Update () (At Assets/Scripts/SendInfo.cs:23)
I looked at like 23, and couldn’t find anything wrong with it;

  Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
2

Do you have a camera with a tag “main camera”? (I’m pretty sure, that would give an error like “there is no camera tagged main camera”)

3

Ah, that did the trick! thanks!

4

I don’t want to discourage you, but you are still new, I really don’t recommend to trying a muktiplayer game. Just try simple games and add more and more to them. I remember when I started, networking just went over my head lol. Just trying to help

5

I’m not necessarily ‘new’ to coding it’s just I am new to unity. I use Photon for networking which finishes most of the network off, well to my knowledge. This is more of a test project to see what unity can do.

6

He meant new to unity too though

7

Ah okay, sorry for the misunderstanding