I'm getting a NullReferenceException for Camera.main

Questions & Answers
1

I’m currently making a game and i was going to implement dashing in the game when i encountered a tiny problem. In the rb.AddForce(Camera.main.transform.forward * dashForce, ForceMode.Force); statement there was an error and i could fix it by removing Camera.main. Why is this happening, Below is my code

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class Dash : MonoBehaviour
{
  [SerializeField] private float dashForce; // should be 30000 or 35000 or somewhere in between or roughly around these numbers
  [SerializeField] private float dashDuration;
  public float dashCoolDownTime = 3;
  public KeyCode dashKey;
  private float nextDashTime;

  private Rigidbody rb;

  private void Awake()
  {
    rb = GetComponent<Rigidbody>();
  }

  private void Update()
  {
    if (Time.time > nextDashTime)
    {
      if (Input.GetKeyDown(dashKey))
      {
          StartCoroutine(Do_Dash());
      }
    }
  }

  public IEnumerator Do_Dash()
  {
    rb.AddForce(Camera.main.transform.forward * dashForce, ForceMode.Force);

    yield return new WaitForSeconds(dashDuration);

    rb.velocity = Vector3.zero;
    nextDashTime = Time.time + dashCoolDownTime;
  } 
}

Btw, i am using the dash Tutorial from DapperDino (Creating Genji - Dash & Double Jump - Part 1 - Unity Tutorial - YouTube).

2

Make sure your camera in the scene hierarchy has the tag “MainCamera”. Like
tormentoarmagedoom said though, make a public variable for your camera and use that, it is hardly ever a good idea to use Camera.Main directly.