C# Third Person Controller CS1061

Following a tutorial on creating a third person controller and I'm stuck on this error:

"Assets/Scripts/Character/PlayerMotor.cs(91,40): error CS1061: Type PlayerCamera' does not contain a definition for CameraState' and no extension method CameraState' of type PlayerCamera' could be found (are you missing a using directive or an assembly reference?)"

I'm following the exact scripting for the problem area and I don't know why I have this error.

Script where the error is located:

 using UnityEngine;
 using System.Collections;
 
 using Helper;
 
 /// <summary>
 /// This script is included with the PlayerCharacter script includes & governs the behaviors of this instance's
 /// ability to move around the enviornment and animate it's model based on human input.
 /// </summary>
 
 public class PlayerMotor : MonoBehaviour 
 {
 
 #region Public Fields & Properties
 
     public float walkSpeed = 3f;
     public float runSpeed = 5f;
     public float sprintSpeed = 7f;
     private float _rotationSpeed = 140f;
     public float jumpHeight = 10f;
     public float gravity = 20f;
 
 #endregion
 
 #region Private Fields & Properties
 
     private float _horizontal = 0f;
     private float _vertical = 0f;
 
     private float _moveSpeed;
 
     private float _airVelocity = 0f;
 
     private Transform _myXform;
 
     private Vector3 _moveDirection = Vector3.zero;
 
     private CharacterController _controller;
 
     private Animator _animator;
 
     private SpeedState _speedState = SpeedState.Run;
     private CameraState _cameraState;
 
     private PlayerCharacter _pc;
     private PlayerCamera _camera;
 
 #endregion
 
 #region Getters & Setters
 
     ///<summary>
     /// Gets or sets the move speed.
     /// </summary>
     /// <value>
     /// The move speed
     /// </value>
     public float MoveSpeed
     {
         get{return _moveSpeed;}
         set{_moveSpeed = value;}
     }
 
 #endregion
 
 #region System Methods
     
     // Use this for initialization
     private void Start () 
     {
         if(networkView.isMine || Network.peerType == NetworkPeerType.Disconnected)
         {
             //Chache references to child components of this gameObject.
             _myXform = this.GetComponent<Transform>();
 
             _pc = this.GetComponent<PlayerCharacter>();
             _camera = this.GetComponent<PlayerCamera>();
 
             _animator = _pc.Animator;
             _controller = _pc.Controller;
         }
         else
         {
             enabled = false;
         }
     }
     
     // Update is called once per frame
     private void Update () 
     {
         _cameraState = _camera.CameraState;
 
         switch(_cameraState)
         {
             case CameraState.Normal:
 
             //Allow the player to rotate their character.
             if(Input.GetAxis(PlayerInput.Horizontal) > 0.1f || Input.GetAxis(PlayerInput.Horizontal) < -0.1f)
             {
                 _myXform.Rotate(0f, Input.GetAxis(PlayerInput.Horizontal) * _rotationSpeed * Time.deltaTime, 0f);
             }
 
             break;
 
             case CameraState.Target:
 
 
 
             break;
         }
     }
 
 #endregion
 
 #region Custom Methods
 
     private void CalculateSpeed()
     {
         switch(_speedState)
         {
             case SpeedState.Walk:
 
             _moveSpeed = walkSpeed;
 
             break;
 
             case SpeedState.Run:
 
             _moveSpeed = runSpeed;
 
             break;
 
             case SpeedState.Sprint:
 
             _moveSpeed = sprintSpeed;
 
             break;
         }
     }
 
 #endregion
 }

Helper Script:

 enter code hereusing UnityEngine;
 using System.Collections;
 
 namespace Helper
 {
 
 #region Reference Cache
 
     public class PlayerInput
     {
         public static string Horizontal = "Horizontal";
         public static string Vertical = "Vertical";
 
         public static string Jump = "Jump";
     }
 
     public class GameTag
     {
         // System Tags
         public static string Untagged = "Untagged";
         public static string Respawn = "Respawn";
         public static string Finish = "Finish";
         public static string EditorOnly = "EditorOnly";
         public static string MainCamera = "MainCamera";
         public static string Player = "Player";
         public static string GameController = "GameController";
 
         public static string PlayerCamera = "PlayerCamera";
     }
 
     public class Resource
     {
         public static string AnimatorController = "System/PlayerAnimator";
     }
 
     public static class AnimatorConditions
     {
         public static string Speed = "Speed";
         public static string Direction = "Direction";
         public static string Grounded = "Grounded";
         public static string AirVelocity = "AirVelocity";
     }
 
 #endregion
 
 #region FSN Numerations
 
     public enum CameraState
     {
         Normal,
         Target
 
     }
 
     public enum SpeedState
     {
         Walk,
         Run,
         Sprint
     }
 
     
 #endregion
 
 #region Object Structures
 
     public struct CameraTargetObject
     {
         private Vector3 position;
 
         private Transform xForm;
 
         public Vector3 Position
         {
             get{return position;}
             set{position = value;}
         }
 
         public Transform XForm
         {
             get{return xForm;}
             set{xForm = value;}
         }
 
         public void Init(string camName, Vector3 pos, Transform transform, Transform parent)
         {
             position = pos;
             xForm = transform;
             xForm.name = camName;
             xForm.parent = parent;
             xForm.localPosition = Vector3.zero;
             xForm.localPosition = position;
         }
     }
 
     public struct CameraMountPoint
     {
         private Vector3 position;
         
         private Transform xForm;
         
         public Vector3 Position
         {
             get{return position;}
             set{position = value;}
         }
         
         public Transform XForm
         {
             get{return xForm;}
             set{xForm = value;}
         }
         
         public void Init(string camName, Vector3 pos, Transform transform, Transform parent)
         {
             position = pos;
             xForm = transform;
             xForm.name = camName;
             xForm.parent = parent;
             xForm.localPosition = Vector3.zero;
             xForm.localPosition = position;
         }
     }
 
 
 
 #endregion
 
 }