SerializedObject target has been destroyed. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr)

As soon as I click on the "Keyboard" button in my scene it takes me to scene(1) and enables MovementKeyboard script as I wanted, but the MovementKeyboard never runs becasue of the error SerializedObject target has been destroyed. UnityEngine.GUIUtility:ProcessEvent(Int32, IntPtr). I have rebuild all the lightings but still in gives the same error as soon as the scene changes.

Script of button --

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.SceneManagement;
 
 public class ControlKeyboard : MonoBehaviour {
 
     public MovementKeyboard ControlKEYBOARD;
 
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void Update () {
         
     }
 
     public void ButtonKeyboard()
     {
         ControlKEYBOARD = ControlKEYBOARD.GetComponent<MovementKeyboard>();
         ControlKEYBOARD.enabled = true;
 
         SceneManager.LoadScene(1);
     }
 }
 

MovementKeyboard Script attached to player-

 public class MovementKeyboard : MonoBehaviour {
 
     public Rigidbody rbKeyboard;
     public float SidewaysForceKeyboard = 500f;
     public float ForwardForceKeyboard = 8000f;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
     void FixedUpdate ()
     {
         //Forward Movement
         rbKeyboard.AddForce(0, 0, ForwardForceKeyboard * Time.deltaTime);
 
         //right movement
         if (Input.GetKey("d"))
         {
             rbKeyboard.AddForce(SidewaysForceKeyboard * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
         }
 
         //Left Movement
         if (Input.GetKey("a"))
         {
             rbKeyboard.AddForce(-SidewaysForceKeyboard * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
         }
     }
 }

Please help me out. Thankyou I have also attached the screenshots of the editor before and after clicking the button.