How can I get the Text component from TextMeshPro ? I’m getting null exception

At the top of the screen :

public GameObject uiSceneText; private TextMeshPro textMeshPro; 

Then in the script at some point :

uiSceneText.SetActive(true);  if (textMeshPro.text != "")     textMeshPro.text = ""; 

The exception error null is on the textMeshPro on the line :

if (textMeshPro.text != "") 

textMeshPro is null.

This screenshot shows the TextMeshPro in the Hierarchy :

TextMeshPro

and I see that the Scene Image object and its child Scene Text both are enabled true.

I want to get the text and add replace a new text with the text already in the Text but the textMeshPro is null.

The complete script :

using System.Collections; using System.Collections.Generic; using TMPro; using UnityEngine;  public class PlayerSpaceshipAreaColliding : MonoBehaviour {     public float rotationSpeed;     public float movingSpeed;     public float secondsToRotate;     public GameObject uiSceneText;      private float timeElapsed = 0;     private float lerpDuration = 3;     private float startValue = 1;     private float endValue = 0;     private float valueToLerp = 0;     private Animator playerAnimator;     private bool exitSpaceShipSurroundingArea = false;     private bool slowd = true;     private TextMeshPro textMeshPro;      // Start is called before the first frame update     void Start()     {         textMeshPro = uiSceneText.GetComponent<TextMeshPro>();          playerAnimator = GetComponent<Animator>();     }      // Update is called once per frame     void Update()     {         if (exitSpaceShipSurroundingArea)         {             if (slowd)                 SlowDown();              if (playerAnimator.GetFloat("Forward") == 0)             {                 slowd = false;                  LockController.PlayerLockState(false);                  uiSceneText.SetActive(true);                  if (textMeshPro.text != "")                     textMeshPro.text = "";                  textMeshPro.text = "Here I will add the new text.";                              }              if (slowd == false)             {                              }         }     }      private void OnTriggerEnter(Collider other)     {         if (other.name == "CrashLandedShipUpDown")         {             exitSpaceShipSurroundingArea = false;             Debug.Log("Entered Spaceship Area !");         }     }      private void OnTriggerExit(Collider other)     {         if (other.name == "CrashLandedShipUpDown")         {             exitSpaceShipSurroundingArea = true;             Debug.Log("Exited Spaceship Area !");         }     }      private void SlowDown()     {         if (timeElapsed < lerpDuration)         {             valueToLerp = Mathf.Lerp(startValue, endValue, timeElapsed / lerpDuration);             playerAnimator.SetFloat("Forward", valueToLerp);             timeElapsed += Time.deltaTime;         }          playerAnimator.SetFloat("Forward", valueToLerp);         valueToLerp = 0;     } }