If you get errors like:

1)Assets/VuforiaAddedScripts/DeployStageOnce.cs(50,51): error CS1061: Type `Vuforia.Anchor' does not contain a definition for `transform' and no extension method `transform' of type `Vuforia.Anchor' could be found. Are you missing an assembly reference?

2)Assets/VuforiaAddedScripts/DeployStageOnce.cs(61,27): error CS0029: Cannot implicitly convert type `Vuforia.Anchor' to `UnityEngine.GameObject'

This code will help you:

using System;

using UnityEngine;

using Vuforia;

public class DeployStageOnce : MonoBehaviour

{

    public GameObject AnchorStage;

   

    private PositionalDeviceTracker _deviceTracker;

    private GameObject _anchorGameObject;

    private GameObject _previousAnchor;

    public void Start()

    {

        if (AnchorStage == null)

        {

            Debug.Log("AnchorStage must be specified");

            return;

        }

        AnchorStage.SetActive(false);

    }

    public void Awake()

    {     

        VuforiaARController.Instance.RegisterVuforiaStartedCallback(OnVuforiaStarted);

    }

    public void OnDestroy()

    {

        VuforiaARController.Instance.UnregisterVuforiaStartedCallback(OnVuforiaStarted);

    }

    private void OnVuforiaStarted()

    {

        _deviceTracker = TrackerManager.Instance.GetTracker<PositionalDeviceTracker>();

    }

    private void AnchorGameObjectSetHitTestPosition(HitTestResult reuslt)

    {

        _anchorGameObject.transform.position = reuslt.Position;

        _anchorGameObject.transform.rotation = reuslt.Rotation;

    }

   

    public void OnInteractiveHitTest(HitTestResult result)

    {

        if (result == null || AnchorStage == null)

        {

            Debug.LogWarning("Hit test is invalid or AnchorStage not set");

            return;

        }

        var anchor = _deviceTracker.CreatePlaneAnchor(Guid.NewGuid().ToString(), result);

        _anchorGameObject = new GameObject();

       

        AnchorGameObjectSetHitTestPosition(result);

        if(anchor != null) {

            AnchorStage.transform.parent = _anchorGameObject.transform;

            AnchorStage.transform.localPosition = Vector3.zero;

            AnchorStage.transform.localRotation = Quaternion.identity;

            AnchorStage.SetActive(true);

        }

        if(_previousAnchor != null) {

            Destroy(_previousAnchor);

        }

        _previousAnchor = _anchorGameObject;   

    }

}