My character suddenly stopped looking up/down

I had somehow duplicated the player, and deleting the copy fixed it.

My player suddenly stopped being able to look up/down at 4126 objects. Here's my code: using System; using UnityEngine; using UnityStandardAssets.CrossPlatformInput;

 namespace UnityStandardAssets.Characters.FirstPerson
 {
     [Serializable]
     public class MouseLook
     {
         public float XSensitivity = 2f;
         public float YSensitivity = 2f;
         public bool clampVerticalRotation = true;
         public float MinimumX = -90F;
         public float MaximumX = 90F;
         public bool smooth;
         public float smoothTime = 5f;
         public bool lockCursor = true;
 
 
         private Quaternion m_CharacterTargetRot;
         private Quaternion m_CameraTargetRot;
         private bool m_cursorIsLocked = true;
 
         public void Init(Transform character, Transform camera)
         {
             m_CharacterTargetRot = character.localRotation;
             m_CameraTargetRot = camera.localRotation;
         }
 
 
         public void LookRotation(Transform character, Transform camera)
         {
             float yRot = CrossPlatformInputManager.GetAxis("Mouse X") * XSensitivity;
             float xRot = CrossPlatformInputManager.GetAxis("Mouse Y") * YSensitivity;
 
             m_CharacterTargetRot *= Quaternion.Euler (0f, yRot, 0f);
             m_CameraTargetRot *= Quaternion.Euler (-xRot, 0f, 0f);
 
             if(clampVerticalRotation)
                 m_CameraTargetRot = ClampRotationAroundXAxis (m_CameraTargetRot);
 
             if(smooth)
             {
                 character.localRotation = Quaternion.Slerp (character.localRotation, m_CharacterTargetRot,
                     smoothTime * Time.deltaTime);
                 camera.localRotation = Quaternion.Slerp (camera.localRotation, m_CameraTargetRot,
                     smoothTime * Time.deltaTime);
             }
             else
             {
                 character.localRotation = m_CharacterTargetRot;
                 camera.localRotation = m_CameraTargetRot;
             }
 
             UpdateCursorLock();
         }
 
         public void SetCursorLock(bool value)
         {
             lockCursor = value;
             if(!lockCursor)
             {//we force unlock the cursor if the user disable the cursor locking helper
                 Cursor.lockState = CursorLockMode.None;
                 Cursor.visible = true;
             }
         }
 
         public void UpdateCursorLock()
         {
             //if the user set "lockCursor" we check & properly lock the cursos
             if (lockCursor)
                 InternalLockUpdate();
         }
 
         private void InternalLockUpdate()
         {
             if(Input.GetKeyUp(KeyCode.Escape))
             {
                 m_cursorIsLocked = false;
             }
             else if(Input.GetMouseButtonUp(0))
             {
                 m_cursorIsLocked = true;
             }
 
             if (m_cursorIsLocked)
             {
                 Cursor.lockState = CursorLockMode.Locked;
                 Cursor.visible = false;
             }
             else if (!m_cursorIsLocked)
             {
                 Cursor.lockState = CursorLockMode.None;
                 Cursor.visible = true;
             }
         }
 
         Quaternion ClampRotationAroundXAxis(Quaternion q)
         {
             q.x /= q.w;
             q.y /= q.w;
             q.z /= q.w;
             q.w = 1.0f;
 
             float angleX = 2.0f * Mathf.Rad2Deg * Mathf.Atan (q.x);
 
             angleX = Mathf.Clamp (angleX, MinimumX, MaximumX);
 
             q.x = Mathf.Tan (0.5f * Mathf.Deg2Rad * angleX);
 
             return q;
         }
 
     }
 }

I also get this error when I click play:

Here are some of my other codes that may have something to do with it: FPC: using System; using UnityEngine; using UnityStandardAssets.CrossPlatformInput; using UnityStandardAssets.Utility; using Random = UnityEngine.Random;

 namespace UnityStandardAssets.Characters.FirstPerson
 {
     [RequireComponent(typeof (CharacterController))]
     [RequireComponent(typeof (AudioSource))]
     public class FirstPersonController : MonoBehaviour
     {
         [SerializeField] private bool m_IsWalking;
         [SerializeField] private float m_WalkSpeed;
         [SerializeField] private float m_RunSpeed;
         [SerializeField] [Range(0f, 1f)] private float m_RunstepLenghten;
         [SerializeField] private float m_JumpSpeed;
         [SerializeField] private float m_StickToGroundForce;
         [SerializeField] private float m_GravityMultiplier;
         [SerializeField] private MouseLook m_MouseLook;
         [SerializeField] private bool m_UseFovKick;
         [SerializeField] private FOVKick m_FovKick = new FOVKick();
         [SerializeField] private bool m_UseHeadBob;
         [SerializeField] private CurveControlledBob m_HeadBob = new CurveControlledBob();
         [SerializeField] private LerpControlledBob m_JumpBob = new LerpControlledBob();
         [SerializeField] private float m_StepInterval;
         [SerializeField] private AudioClip[] m_FootstepSounds;    // an array of footstep sounds that will be randomly selected from.
         [SerializeField] private AudioClip m_JumpSound;           // the sound played when character leaves the ground.
         [SerializeField] private AudioClip m_LandSound;           // the sound played when character touches back on ground.
 
         private Camera m_Camera;
         private bool m_Jump;
         private float m_YRotation;
         private Vector2 m_Input;
         private Vector3 m_MoveDir = Vector3.zero;
         private CharacterController m_CharacterController;
         private CollisionFlags m_CollisionFlags;
         private bool m_PreviouslyGrounded;
         private Vector3 m_OriginalCameraPosition;
         private float m_StepCycle;
         private float m_NextStep;
         private bool m_Jumping;
         private AudioSource m_AudioSource;
 
         // Use this for initialization
         private void Start()
         {
             m_CharacterController = GetComponent<CharacterController>();
             m_Camera = Camera.main;
             m_OriginalCameraPosition = m_Camera.transform.localPosition;
             m_FovKick.Setup(m_Camera);
             m_HeadBob.Setup(m_Camera, m_StepInterval);
             m_StepCycle = 0f;
             m_NextStep = m_StepCycle/2f;
             m_Jumping = false;
             m_AudioSource = GetComponent<AudioSource>();
             m_MouseLook.Init(transform , m_Camera.transform);
         }
 
 
         // Update is called once per frame
         private void Update()
         {
             RotateView();
             // the jump state needs to read here to make sure it is not missed
             if (!m_Jump)
             {
                 m_Jump = CrossPlatformInputManager.GetButtonDown("Jump");
             }
 
             if (!m_PreviouslyGrounded && m_CharacterController.isGrounded)
             {
                 StartCoroutine(m_JumpBob.DoBobCycle());
                 PlayLandingSound();
                 m_MoveDir.y = 0f;
                 m_Jumping = false;
             }
             if (!m_CharacterController.isGrounded && !m_Jumping && m_PreviouslyGrounded)
             {
                 m_MoveDir.y = 0f;
             }
 
             m_PreviouslyGrounded = m_CharacterController.isGrounded;
         }
 
 
         private void PlayLandingSound()
         {
             m_AudioSource.clip = m_LandSound;
             m_AudioSource.Play();
             m_NextStep = m_StepCycle + .5f;
         }
 
 
         private void FixedUpdate()
         {
             float speed;
             GetInput(out speed);
             // always move along the camera forward as it is the direction that it being aimed at
             Vector3 desiredMove = transform.forward*m_Input.y + transform.right*m_Input.x;
 
             // get a normal for the surface that is being touched to move along it
             RaycastHit hitInfo;
             Physics.SphereCast(transform.position, m_CharacterController.radius, Vector3.down, out hitInfo,
                                m_CharacterController.height/2f, Physics.AllLayers, QueryTriggerInteraction.Ignore);
             desiredMove = Vector3.ProjectOnPlane(desiredMove, hitInfo.normal).normalized;
 
             m_MoveDir.x = desiredMove.x*speed;
             m_MoveDir.z = desiredMove.z*speed;
 
 
             if (m_CharacterController.isGrounded)
             {
                 m_MoveDir.y = -m_StickToGroundForce;
 
                 if (m_Jump)
                 {
                     m_MoveDir.y = m_JumpSpeed;
                     PlayJumpSound();
                     m_Jump = false;
                     m_Jumping = true;
                 }
             }
             else
             {
                 m_MoveDir += Physics.gravity*m_GravityMultiplier*Time.fixedDeltaTime;
             }
             m_CollisionFlags = m_CharacterController.Move(m_MoveDir*Time.fixedDeltaTime);
 
             ProgressStepCycle(speed);
             UpdateCameraPosition(speed);
 
             m_MouseLook.UpdateCursorLock();
         }
 
 
         private void PlayJumpSound()
         {
             m_AudioSource.clip = m_JumpSound;
             m_AudioSource.Play();
         }
 
 
         private void ProgressStepCycle(float speed)
         {
             if (m_CharacterController.velocity.sqrMagnitude > 0 && (m_Input.x != 0 || m_Input.y != 0))
             {
                 m_StepCycle += (m_CharacterController.velocity.magnitude + (speed*(m_IsWalking ? 1f : m_RunstepLenghten)))*
                              Time.fixedDeltaTime;
             }
 
             if (!(m_StepCycle > m_NextStep))
             {
                 return;
             }
 
             m_NextStep = m_StepCycle + m_StepInterval;
 
             PlayFootStepAudio();
         }
 
 
         private void PlayFootStepAudio()
         {
             if (!m_CharacterController.isGrounded)
             {
                 return;
             }
             // pick & play a random footstep sound from the array,
             // excluding sound at index 0
             int n = Random.Range(1, m_FootstepSounds.Length);
             m_AudioSource.clip = m_FootstepSounds[n];
             m_AudioSource.PlayOneShot(m_AudioSource.clip);
             // move picked sound to index 0 so it's not picked next time
             m_FootstepSounds[n] = m_FootstepSounds[0];
             m_FootstepSounds[0] = m_AudioSource.clip;
         }
 
 
         private void UpdateCameraPosition(float speed)
         {
             Vector3 newCameraPosition;
             if (!m_UseHeadBob)
             {
                 return;
             }
             if (m_CharacterController.velocity.magnitude > 0 && m_CharacterController.isGrounded)
             {
                 m_Camera.transform.localPosition =
                     m_HeadBob.DoHeadBob(m_CharacterController.velocity.magnitude +
                                       (speed*(m_IsWalking ? 1f : m_RunstepLenghten)));
                 newCameraPosition = m_Camera.transform.localPosition;
                 newCameraPosition.y = m_Camera.transform.localPosition.y - m_JumpBob.Offset();
             }
             else
             {
                 newCameraPosition = m_Camera.transform.localPosition;
                 newCameraPosition.y = m_OriginalCameraPosition.y - m_JumpBob.Offset();
             }
             m_Camera.transform.localPosition = newCameraPosition;
         }
 
 
         private void GetInput(out float speed)
         {
             // Read input
             float horizontal = CrossPlatformInputManager.GetAxis("Horizontal");
             float vertical = CrossPlatformInputManager.GetAxis("Vertical");
 
             bool waswalking = m_IsWalking;
 
 #if !MOBILE_INPUT
             // On standalone builds, walk/run speed is modified by a key press.
             // keep track of whether or not the character is walking or running
             m_IsWalking = !Input.GetKey(KeyCode.LeftShift);
 #endif
             // set the desired speed to be walking or running
             speed = m_IsWalking ? m_WalkSpeed : m_RunSpeed;
             m_Input = new Vector2(horizontal, vertical);
 
             // normalize input if it exceeds 1 in combined length:
             if (m_Input.sqrMagnitude > 1)
             {
                 m_Input.Normalize();
             }
 
             // handle speed change to give an fov kick
             // only if the player is going to a run, is running and the fovkick is to be used
             if (m_IsWalking != waswalking && m_UseFovKick && m_CharacterController.velocity.sqrMagnitude > 0)
             {
                 StopAllCoroutines();
                 StartCoroutine(!m_IsWalking ? m_FovKick.FOVKickUp() : m_FovKick.FOVKickDown());
             }
         }
 
 
         private void RotateView()
         {
             m_MouseLook.LookRotation (transform, m_Camera.transform);
         }
 
 
         private void OnControllerColliderHit(ControllerColliderHit hit)
         {
             Rigidbody body = hit.collider.attachedRigidbody;
             //dont move the rigidbody if the character is on top of it
             if (m_CollisionFlags == CollisionFlags.Below)
             {
                 return;
             }
 
             if (body == null || body.isKinematic)
             {
                 return;
             }
             body.AddForceAtPosition(m_CharacterController.velocity*0.1f, hit.point, ForceMode.Impulse);
         }
     }
 }
 

HeadBob:

 using System;
 using UnityEngine;
 using UnityStandardAssets.Utility;
 
 namespace UnityStandardAssets.Characters.FirstPerson
 {
     public class HeadBob : MonoBehaviour
     {
         public Camera Camera;
         public CurveControlledBob motionBob = new CurveControlledBob();
         public LerpControlledBob jumpAndLandingBob = new LerpControlledBob();
         public RigidbodyFirstPersonController rigidbodyFirstPersonController;
         public float StrideInterval;
         [Range(0f, 1f)] public float RunningStrideLengthen;
 
        // private CameraRefocus m_CameraRefocus;
         private bool m_PreviouslyGrounded;
         private Vector3 m_OriginalCameraPosition;
 
 
         private void Start()
         {
             motionBob.Setup(Camera, StrideInterval);
             m_OriginalCameraPosition = Camera.transform.localPosition;
        //     m_CameraRefocus = new CameraRefocus(Camera, transform.root.transform, Camera.transform.localPosition);
         }
 
 
         private void Update()
         {
           //  m_CameraRefocus.GetFocusPoint();
             Vector3 newCameraPosition;
             if (rigidbodyFirstPersonController.Velocity.magnitude > 0 && rigidbodyFirstPersonController.Grounded)
             {
                 Camera.transform.localPosition = motionBob.DoHeadBob(rigidbodyFirstPersonController.Velocity.magnitude*(rigidbodyFirstPersonController.Running ? RunningStrideLengthen : 1f));
                 newCameraPosition = Camera.transform.localPosition;
                 newCameraPosition.y = Camera.transform.localPosition.y - jumpAndLandingBob.Offset();
             }
             else
             {
                 newCameraPosition = Camera.transform.localPosition;
                 newCameraPosition.y = m_OriginalCameraPosition.y - jumpAndLandingBob.Offset();
             }
             Camera.transform.localPosition = newCameraPosition;
 
             if (!m_PreviouslyGrounded && rigidbodyFirstPersonController.Grounded)
             {
                 StartCoroutine(jumpAndLandingBob.DoBobCycle());
             }
 
             m_PreviouslyGrounded = rigidbodyFirstPersonController.Grounded;
           //  m_CameraRefocus.SetFocusPoint();
         }
     }
 }

RigidBodyController:

 using System;
 using UnityEngine;
 using UnityStandardAssets.CrossPlatformInput;
 
 namespace UnityStandardAssets.Characters.FirstPerson
 {
     [RequireComponent(typeof (Rigidbody))]
     [RequireComponent(typeof (CapsuleCollider))]
     public class RigidbodyFirstPersonController : MonoBehaviour
     {
         [Serializable]
         public class MovementSettings
         {
             public float ForwardSpeed = 8.0f;   // Speed when walking forward
             public float BackwardSpeed = 4.0f;  // Speed when walking backwards
             public float StrafeSpeed = 4.0f;    // Speed when walking sideways
             public float RunMultiplier = 2.0f;   // Speed when sprinting
             public KeyCode RunKey = KeyCode.LeftShift;
             public float JumpForce = 30f;
             public AnimationCurve SlopeCurveModifier = new AnimationCurve(new Keyframe(-90.0f, 1.0f), new Keyframe(0.0f, 1.0f), new Keyframe(90.0f, 0.0f));
             [HideInInspector] public float CurrentTargetSpeed = 8f;
 
 #if !MOBILE_INPUT
             private bool m_Running;
 #endif
 
             public void UpdateDesiredTargetSpeed(Vector2 input)
             {
                 if (input == Vector2.zero) return;
                 if (input.x > 0 || input.x < 0)
                 {
                     //strafe
                     CurrentTargetSpeed = StrafeSpeed;
                 }
                 if (input.y < 0)
                 {
                     //backwards
                     CurrentTargetSpeed = BackwardSpeed;
                 }
                 if (input.y > 0)
                 {
                     //forwards
                     //handled last as if strafing and moving forward at the same time forwards speed should take precedence
                     CurrentTargetSpeed = ForwardSpeed;
                 }
 #if !MOBILE_INPUT
                 if (Input.GetKey(RunKey))
                 {
                     CurrentTargetSpeed *= RunMultiplier;
                     m_Running = true;
                 }
                 else
                 {
                     m_Running = false;
                 }
 #endif
             }
 
 #if !MOBILE_INPUT
             public bool Running
             {
                 get { return m_Running; }
             }
 #endif
         }
 
 
         [Serializable]
         public class AdvancedSettings
         {
             public float groundCheckDistance = 0.01f; // distance for checking if the controller is grounded ( 0.01f seems to work best for this )
             public float stickToGroundHelperDistance = 0.5f; // stops the character
             public float slowDownRate = 20f; // rate at which the controller comes to a stop when there is no input
             public bool airControl; // can the user control the direction that is being moved in the air
             [Tooltip("set it to 0.1 or more if you get stuck in wall")]
             public float shellOffset; //reduce the radius by that ratio to avoid getting stuck in wall (a value of 0.1f is nice)
         }
 
 
         public Camera cam;
         public MovementSettings movementSettings = new MovementSettings();
         public MouseLook mouseLook = new MouseLook();
         public AdvancedSettings advancedSettings = new AdvancedSettings();
 
 
         private Rigidbody m_RigidBody;
         private CapsuleCollider m_Capsule;
         private float m_YRotation;
         private Vector3 m_GroundContactNormal;
         private bool m_Jump, m_PreviouslyGrounded, m_Jumping, m_IsGrounded;
 
 
         public Vector3 Velocity
         {
             get { return m_RigidBody.velocity; }
         }
 
         public bool Grounded
         {
             get { return m_IsGrounded; }
         }
 
         public bool Jumping
         {
             get { return m_Jumping; }
         }
 
         public bool Running
         {
             get
             {
  #if !MOBILE_INPUT
                 return movementSettings.Running;
 #else
                 return false;
 #endif
             }
         }
 
 
         private void Start()
         {
             m_RigidBody = GetComponent<Rigidbody>();
             m_Capsule = GetComponent<CapsuleCollider>();
             mouseLook.Init (transform, cam.transform);
         }
 
 
         private void Update()
         {
             RotateView();
 
             if (CrossPlatformInputManager.GetButtonDown("Jump") && !m_Jump)
             {
                 m_Jump = true;
             }
         }
 
 
         private void FixedUpdate()
         {
             GroundCheck();
             Vector2 input = GetInput();
 
             if ((Mathf.Abs(input.x) > float.Epsilon || Mathf.Abs(input.y) > float.Epsilon) && (advancedSettings.airControl || m_IsGrounded))
             {
                 // always move along the camera forward as it is the direction that it being aimed at
                 Vector3 desiredMove = cam.transform.forward*input.y + cam.transform.right*input.x;
                 desiredMove = Vector3.ProjectOnPlane(desiredMove, m_GroundContactNormal).normalized;
 
                 desiredMove.x = desiredMove.x*movementSettings.CurrentTargetSpeed;
                 desiredMove.z = desiredMove.z*movementSettings.CurrentTargetSpeed;
                 desiredMove.y = desiredMove.y*movementSettings.CurrentTargetSpeed;
                 if (m_RigidBody.velocity.sqrMagnitude <
                     (movementSettings.CurrentTargetSpeed*movementSettings.CurrentTargetSpeed))
                 {
                     m_RigidBody.AddForce(desiredMove*SlopeMultiplier(), ForceMode.Impulse);
                 }
             }
 
             if (m_IsGrounded)
             {
                 m_RigidBody.drag = 5f;
 
                 if (m_Jump)
                 {
                     m_RigidBody.drag = 0f;
                     m_RigidBody.velocity = new Vector3(m_RigidBody.velocity.x, 0f, m_RigidBody.velocity.z);
                     m_RigidBody.AddForce(new Vector3(0f, movementSettings.JumpForce, 0f), ForceMode.Impulse);
                     m_Jumping = true;
                 }
 
                 if (!m_Jumping && Mathf.Abs(input.x) < float.Epsilon && Mathf.Abs(input.y) < float.Epsilon && m_RigidBody.velocity.magnitude < 1f)
                 {
                     m_RigidBody.Sleep();
                 }
             }
             else
             {
                 m_RigidBody.drag = 0f;
                 if (m_PreviouslyGrounded && !m_Jumping)
                 {
                     StickToGroundHelper();
                 }
             }
             m_Jump = false;
         }
 
 
         private float SlopeMultiplier()
         {
             float angle = Vector3.Angle(m_GroundContactNormal, Vector3.up);
             return movementSettings.SlopeCurveModifier.Evaluate(angle);
         }
 
 
         private void StickToGroundHelper()
         {
             RaycastHit hitInfo;
             if (Physics.SphereCast(transform.position, m_Capsule.radius * (1.0f - advancedSettings.shellOffset), Vector3.down, out hitInfo,
                                    ((m_Capsule.height/2f) - m_Capsule.radius) +
                                    advancedSettings.stickToGroundHelperDistance, Physics.AllLayers, QueryTriggerInteraction.Ignore))
             {
                 if (Mathf.Abs(Vector3.Angle(hitInfo.normal, Vector3.up)) < 85f)
                 {
                     m_RigidBody.velocity = Vector3.ProjectOnPlane(m_RigidBody.velocity, hitInfo.normal);
                 }
             }
         }
 
 
         private Vector2 GetInput()
         {
             
             Vector2 input = new Vector2
                 {
                     x = CrossPlatformInputManager.GetAxis("Horizontal"),
                     y = CrossPlatformInputManager.GetAxis("Vertical")
                 };
             movementSettings.UpdateDesiredTargetSpeed(input);
             return input;
         }
 
 
         private void RotateView()
         {
             //avoids the mouse looking if the game is effectively paused
             if (Mathf.Abs(Time.timeScale) < float.Epsilon) return;
 
             // get the rotation before it's changed
             float oldYRotation = transform.eulerAngles.y;
 
             mouseLook.LookRotation (transform, cam.transform);
 
             if (m_IsGrounded || advancedSettings.airControl)
             {
                 // Rotate the rigidbody velocity to match the new direction that the character is looking
                 Quaternion velRotation = Quaternion.AngleAxis(transform.eulerAngles.y - oldYRotation, Vector3.up);
                 m_RigidBody.velocity = velRotation*m_RigidBody.velocity;
             }
         }
 
         /// sphere cast down just beyond the bottom of the capsule to see if the capsule is colliding round the bottom
         private void GroundCheck()
         {
             m_PreviouslyGrounded = m_IsGrounded;
             RaycastHit hitInfo;
             if (Physics.SphereCast(transform.position, m_Capsule.radius * (1.0f - advancedSettings.shellOffset), Vector3.down, out hitInfo,
                                    ((m_Capsule.height/2f) - m_Capsule.radius) + advancedSettings.groundCheckDistance, Physics.AllLayers, QueryTriggerInteraction.Ignore))
             {
                 m_IsGrounded = true;
                 m_GroundContactNormal = hitInfo.normal;
             }
             else
             {
                 m_IsGrounded = false;
                 m_GroundContactNormal = Vector3.up;
             }
             if (!m_PreviouslyGrounded && m_IsGrounded && m_Jumping)
             {
                 m_Jumping = false;
             }
         }
     }
 }