1. Create any project
2. Add Standard Assets Utility, Characters
3. Add prefab FPSController
4. Play the scene
5. You are going to get error "transform.localRotation assign attempt for 'FirstPersonCharacter' is not valid. Input rotation is { NaN, NaN, NaN, NaN }."

I assume you forgot to:

FirstPersonController.cs

private void RotateView()
{
m_MouseLook.LookRotation (transform, m_Camera.transform);
//was MouseLook.LookRotation (transform, m_Camera.transform);
m_CameraRefocus.GetFocusPoint();
}

MouseLook.cs

private void Start()
{
m_CharacterController = GetComponent<CharacterController>();
m_Camera = Camera.main;
m_OriginalCameraPosition = m_Camera.transform.localPosition;
m_CameraRefocus = new CameraRefocus(m_Camera, transform, 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);
//was whitout m_MouseLook.Init,
//because u were multiplying quat by zero
}

Any way, movement also isn't working.

Reproduced: 5.0.0b15