Camera main ошибка

Пишу 2D платформер, дошел до того, что нужно сделать оружие. Пишу скрипт, написал все как нужно, однако unity выдает, что Camera не содержит определения для «main»(camera does not contain a definition for «main»).
Что делать? Помогите.
Вот скрипт:

using UnityEngine;
using System.Collections;

public class FireScript2D : MonoBehaviour
{

    public float speed = 10; // скорость пули
    public Rigidbody2D bullet; // префаб нашей пули
    public Transform gunPoint; // точка рождения
    public float fireRate = 1; // скорострельность
    public bool facingRight = true; // направление на старте сцены, вправо?

    public Transform zRotate; // объект для вращения по оси Z

    // ограничение вращения
    public float minAngle = -40;
    public float maxAngle = 40;

    private float curTimeout, angle;
    private int invert;
    private Vector3 mouse;

    void Start()
    {
        if (!facingRight) invert = -1; else invert = 1;
    }

    void SetRotation()
    {
        Vector3 mousePosMain = Input.mousePosition;
        mousePosMain.z = Camera.main.transform.position.z;
        mouse = Camera.main.ScreenToWorldPoint(mousePosMain);
        Vector3 lookPos = mouse - transform.position;
        angle = Mathf.Atan2(lookPos.y, lookPos.x * invert) * Mathf.Rad2Deg;
        angle = Mathf.Clamp(angle, minAngle, maxAngle);
        zRotate.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
    }

    void Update()
    {
        if (Input.GetMouseButton(0))
        {
            Fire();
        }
        else
        {
            curTimeout = 1000;
        }

        if (zRotate) SetRotation();

        if (angle == maxAngle && mouse.x < zRotate.position.x && facingRight) Flip();
        else if (angle == maxAngle && mouse.x > zRotate.position.x && !facingRight) Flip();
    }

    void Flip() // отражение по горизонтали
    {
        facingRight = !facingRight;
        Vector3 theScale = transform.localScale;
        theScale.x *= -1;
        invert *= -1;
        transform.localScale = theScale;
    }

    void Fire()
    {
        curTimeout += Time.deltaTime;
        if (curTimeout > fireRate)
        {
            curTimeout = 0;
            Vector3 direction = gunPoint.position - transform.position;
            Rigidbody2D clone = Instantiate(bullet, gunPoint.position, Quaternion.identity) as Rigidbody2D;
            clone.velocity = transform.TransformDirection(direction.normalized * speed);
            clone.transform.right = direction.normalized;
        }
    }
}

Заранее спасибо.

Write a 2D platformer, got to the point that you need to make a weapon. Write the script, wrote everything as it should, however, unity gives that Camera does not contain a definition for «main»(camera does not contain a definition for «main»).
What to do? Help.
Here is the script:

using UnityEngine;
using System.Collections;

public class FireScript2D : MonoBehaviour
{

 public float speed = 10; // bullet speed
 public Rigidbody2D bullet; // prefab of our bullets
 public Transform gunPoint; // point of birth
 public float fireRate = 1; // rate of fire
 public bool facingRight = true; // direction at the start of the scene, right?

 public Transform zRotate; // object to rotate on the Z axis

 // limit rotation
 public float minAngle = -40;
 public float maxAngle = 40;

 private float curTimeout, angle;
 private int invert;
 private Vector3 mouse;

 void Start()
{
 if (!facingRight) invert = -1; else invert = 1;
}

 void SetRotation()
{
 MousePosMain Vector3 = Input.mousePosition;
 mousePosMain.z = Camera.main.transform.position.z;
 mouse = Camera.main.ScreenToWorldPoint(mousePosMain);
 Vector3 lookPos = mouse - transform.position;
 angle = Mathf.Atan2(lookPos.y, lookPos.x * invert) * Mathf.Rad2Deg;
 angle = Mathf.Clamp(angle, minAngle, maxAngle);
 zRotate.rotation = Quaternion.AngleAxis(angle, Vector3.forward);
}

 void Update()
{
 if (Input.GetMouseButton(0))
{
Fire();
}
else
{
 curTimeout = 1000;
}

 if (zRotate) SetRotation();

 if (angle == maxAngle && mouse.x < zRotate.position.x && facingRight) Flip();
 else if (angle == maxAngle && mouse.x > zRotate.position.x && !facingRight) Flip();
}

 void Flip() // flip horizontally
{
 facingRight = !facingRight;
 Vector3 theScale = transform.localScale;
 theScale.x *= -1;
 invert *= -1;
 transform.localScale = theScale;
}

 void Fire()
{
 curTimeout += Time.deltaTime;
 if (curTimeout > fireRate)
{
 curTimeout = 0;
 Vector3 direction = gunPoint.position - transform.position;
 Rigidbody2D clone = Instantiate(bullet, gunPoint.position, Quaternion.identity) as Rigidbody2D;
 clone.velocity = transform.TransformDirection(direction.normalized * speed);
 clone.transform.right = direction.normalized;
}
}
}

Thanks in advance.

Hello,

I will explain what I have done to obtain 6 errors with a new project as I plan to make a little multiplayer game.

Let’s go step by step

1- I create a new project in Unity 2019.2.19f1 (64-bit)
2- I imported Playmaker v1.9.0.p19
3- I imported Playmaker Ecosystem
4- I Imported PUN2 from the Asset Store tab inside Unity

Everything is alright and then :

5- I import «Play Maker Pun2» from the ecosystem.

Now I have the following 6 errors :

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(84,22): error CS0117: ‘ClientState’ does not contain a definition for ‘ConnectedToGameServer’

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(85,22): error CS0117: ‘ClientState’ does not contain a definition for ‘ConnectedToMasterServer’

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(87,22): error CS0117: ‘ClientState’ does not contain a definition for ‘ConnectingToGameServer’

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(89,22): error CS0117: ‘ClientState’ does not contain a definition for ‘ConnectingToMasterServer’

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(92,22): error CS0117: ‘ClientState’ does not contain a definition for ‘DisconnectingFromGameServer’

AssetsPlayMaker PUN 2ScriptsUtilsPlayMakerPhotonLUT.cs(93,22): error CS0117: ‘ClientState’ does not contain a definition for ‘DisconnectingFromMasterServer’

As I know nothing about coding I cannot understand if I have done something wrong.
If anyone could help me it would be greatly appreciated ^^

If I remember correctly I have tried with this 3 Unity versions and I have a set of errors for each one.
Unity 2019.2.19f1 (64-bit)
Unity 2019.1.0f2 (64-bit)
Unity 2018.3.11f1 (64-bit)

Bye,
NewTo