The animation state Moveto could not be played because it couldn't be found!

When I upgrade the app to unity 2018.3.3f1, then there are problems in my app. Object move does not appear in its error below

The animation state Moveto could not be played because it couldn't be found!
Please attach an animation clip with the name 'Moveto' or call this function only for existing animations.
UnityEngine.Animationlay(String)
Ulti:MoveTo(GameObject, Vector2, Single) (at Assets/Scripts/Play/Ulti.cs:48)
GameController:RuleChecker(GameObject, GameObject) (at Assets/Scripts/Other/GameController.cs:153)
GameController:JewelSelecter() (at Assets/Scripts/Other/GameController.cs:99)
GameController:Update() (at Assets/Scripts/Other/GameController.cs:70)

this app Script



using UnityEngine;
using System.Collections;
using System.Collections.Generic;

public class Ulti : MonoBehaviour
{

public static List<JewelObj> ListPlus(List<JewelObj> l1, List<JewelObj> l2, JewelObj bonus)
{
List<JewelObj> tmp = new List<JewelObj>();
for (int i = l1.Count - 1; i >= 0; i--)
{
tmp.Add(l1);
}
if (bonus != null)
tmp.Add(bonus);

for (int i = 0; i < l2.Count; i++)
{
tmp.Add(l2);
}

return tmp;
}

public static void MoveTo(GameObject obj, Vector2 NewPos, float duration)
{
obj.SetActive(true);
Animation anim = obj.GetComponent<Animation>();
//if (anim.GetClipCount() > 1)
//{
// Destroy(anim.GetClip("Moveto"));
//}
anim.enabled = true;
AnimationClip animclip = new AnimationClip();
#if UNITY_5
animclip.legacy = true;
#endif
AnimationCurve curvex = AnimationCurve.Linear(0, obj.transform.localPosition.x, duration, NewPos.x);
AnimationCurve curvey = AnimationCurve.Linear(0, obj.transform.localPosition.y, duration, NewPos.y);
AnimationCurve curvenable = AnimationCurve.Linear(0, 1, duration, 0);

animclip.SetCurve("", typeof(Transform), "localPosition.x", curvex);
animclip.SetCurve("", typeof(Transform), "localPosition.y", curvey);
animclip.SetCurve("", typeof(Animation), "m_Enabled", curvenable);

anim.AddClip(animclip, "Moveto");
anim.Play("Moveto");
Destroy(animclip, duration);
}

public static void MoveTo(GameObject obj, Vector2 NewPos, float duration, float z)
{
Animation anim = obj.GetComponent<Animation>();
//if (anim.GetClipCount() > 1)
//{
// anim.RemoveClip("Moveto");
//}
anim.enabled = true;
AnimationClip animclip = new AnimationClip();
#if UNITY_5
animclip.legacy = true;
#endif
AnimationCurve curvex = AnimationCurve.Linear(0, obj.transform.localPosition.x, duration, NewPos.x);
AnimationCurve curvey = AnimationCurve.Linear(0, obj.transform.localPosition.y, duration, NewPos.y);
AnimationCurve curvez = AnimationCurve.Linear(0, z, duration, z);
AnimationCurve curvenable = AnimationCurve.Linear(0, 1, duration, 0);

animclip.SetCurve("", typeof(Transform), "localPosition.x", curvex);
animclip.SetCurve("", typeof(Transform), "localPosition.y", curvey);
animclip.SetCurve("", typeof(Transform), "localPosition.z", curvez);
animclip.SetCurve("", typeof(Animation), "m_Enabled", curvenable);

anim.AddClip(animclip, "Moveto");
anim.Play("Moveto");
Destroy(animclip, duration);
}
public static void MoveTo(GameObject obj, Vector2 startpos, Vector2 NewPos, float duration, float z)
{
Animation anim = obj.GetComponent<Animation>();
//if (anim.GetClipCount() > 1)
//{
// anim.RemoveClip("Moveto");
//}
anim.enabled = true;
AnimationClip animclip = new AnimationClip();
#if UNITY_5
animclip.legacy = true;
#endif
AnimationCurve curvex = AnimationCurve.Linear(0, startpos.x, duration, NewPos.x);
AnimationCurve curvey = AnimationCurve.Linear(0, startpos.y, duration, NewPos.y);
AnimationCurve curvez = AnimationCurve.Linear(0, z, duration, z);
AnimationCurve curvenable = AnimationCurve.Linear(0, 1, duration, 0);

animclip.SetCurve("", typeof(Transform), "localPosition.x", curvex);
animclip.SetCurve("", typeof(Transform), "localPosition.y", curvey);
animclip.SetCurve("", typeof(Transform), "localPosition.z", curvez);
animclip.SetCurve("", typeof(Animation), "m_Enabled", curvenable);

anim.AddClip(animclip, "Moveto");
anim.Play("Moveto");
Destroy(animclip, duration);
}
public static IEnumerator IEDrop(GameObject obj, Vector2 NewPos, float speed)
{
JewelObj script = obj.GetComponent<JewelObj>();
Collider2D coll = obj.GetComponent<Collider2D>();
if (obj != null)
{
Transform _tranform = obj.transform;
coll.enabled = false;
script.isMove = true;
while (_tranform != null && _tranform.localPosition.y - NewPos.y > 0.1f)
{
_tranform.localPosition -= new Vector3(0, Time.smoothDeltaTime * speed);
yield return null;
}
if (_tranform != null)
{
_tranform.localPosition = new Vector3(NewPos.x, NewPos.y);

script.Bounce();
script.RuleChecker();
yield return new WaitForSeconds(0.2f);
if (coll != null)
{
coll.enabled = true;
script.isMove = false;
}
}
}
}

}