I want to be able to set the Vcam variable to a global gameobject in the action but it only allows me to drag a drop a gameobject into the vcam variable at the moment. What would i need to do to fix this?  
using UnityEngine;
namespace HutongGames.PlayMaker.Actions.ecosystem.cinemachine
{
    [ActionCategory("Cinemachine")]
    [Tooltip("Allows you to adjust noise on a Cinemachine camera that has perlin noise enabled.")]
    public class CinemachineNoiseAdjust : FsmStateAction
    {
        [CheckForComponent(typeof(Cinemachine.CinemachineVirtualCamera))]
        [RequiredField]
        public Cinemachine.CinemachineVirtualCamera vcam;
        private Cinemachine.CinemachineBasicMultiChannelPerlin noiseChannel;
        public FsmFloat Amplitude;
        public FsmFloat Frequency;
        public FsmBool everyFrame;
        private bool goEveryFrame;
        private float goAmplitude;
        private float goFrequency;
        public override void OnEnter()
        {
            goAmplitude = Amplitude.Value;
            goFrequency = Frequency.Value;
            goEveryFrame = everyFrame.Value;
            vcam.GetCinemachineComponent<Cinemachine.CinemachineBasicMultiChannelPerlin>().m_AmplitudeGain = goAmplitude;
            vcam.GetCinemachineComponent<Cinemachine.CinemachineBasicMultiChannelPerlin>().m_FrequencyGain = goFrequency;
            if (!goEveryFrame)
                Finish();
        }
        public override void OnUpdate()
        {
            base.OnUpdate();
            if (goEveryFrame == true)
            {
                goAmplitude = Amplitude.Value;
                goFrequency = Frequency.Value;
                goEveryFrame = everyFrame.Value;
                vcam.GetCinemachineComponent<Cinemachine.CinemachineBasicMultiChannelPerlin>().m_AmplitudeGain = goAmplitude;
                vcam.GetCinemachineComponent<Cinemachine.CinemachineBasicMultiChannelPerlin>().m_FrequencyGain = goFrequency;
            }
        }
        public override void Reset()
        {
            Amplitude = null;
            Frequency = null;
            vcam = null;
            noiseChannel = null;
            goFrequency = 0;
            goAmplitude = 0;
            everyFrame = false;
            goEveryFrame = false;
        }
    }
}