Object reference not set to an instance of an object (Unity 2D animation)

Hey guys, I’m currently trying to figure out how to Animate in Unity 2D and with that I stumbled into transitioning. Although I have no idea how to call the transition parameters into code, this is my current attempt which is giving the error above. I dont know why Its giving me the error as in Start() I called the animator component into the script.
(full error: NullReferenceException: Object reference not set to an instance of an object
MovementFixed.Update () (at Assets/Script/MovementFixed.cs:21)
)
Any help would be great!
Thanks!

Animator animator;
public float speed = 1.5f;
public int Direction = 0;

	void start(){
	animator = this.GetComponent<Animator>();
}

void Update ()
{
	if (Input.GetKey (KeyCode.LeftArrow)) {
		transform.position += Vector3.left * speed * Time.deltaTime;
		animator.SetInteger("Direction", 1);
	}
	if (Input.GetKey (KeyCode.RightArrow)) {
		transform.position += Vector3.right * speed * Time.deltaTime;
		animator.SetInteger("Direction", 1);
	}
	if (Input.GetKey (KeyCode.UpArrow)) {
		transform.position += Vector3.up * speed * Time.deltaTime;
		animator.SetInteger("Direction", 1);
	}
	if (Input.GetKey (KeyCode.DownArrow)) {
		transform.position += Vector3.down * speed * Time.deltaTime;
		animator.SetInteger("Direction", 1);
	}

}

}

This is a regular C# error where a variable hasn’t been initialised before it’s being used. In this case, it’s because your Start() method is called start() and therefore isn’t being called by Unity. C# is case-sensitive.

Because of this, your animator variable hasn’t been initialised, so explodes the first time you try to use it.

Rename it to Start() and the problem should go away.