How do i make a panel question appear when my FPSController walks through a tigger collider?

I did a menu containing the components in question canvas. But when writing code for collision cube to shift to the canvas is not. :(

I did a search on google but could not find the desired answer. And I have written many times to try code without success :(

Here is my code file questionScript:

 $$anonymous$$enuScript quesScriptReference;
 
     void Start () {
         quesScriptReference = GameObject.Find ("$$anonymous$$enu").GetComponent<$$anonymous$$enuScript> ();
     }
     void OnTriggerEnter(){
         if (quesScriptReference.inGame()) {
             if (Input.Get$$anonymous$$eyDown ($$anonymous$$eyCode.Space) ||
                 Input.Get$$anonymous$$ouseButtonDown(0)) {
                 quesScriptReference.quesGame();
             }
     }
 }
 

The menuScript is the code menu: `public class $$anonymous$$enuScript : $$anonymous$$anagerBase{

 public GameObject menuPanel;
 public GameObject rulePanel;
 public GameObject exitPanel;
 public GameObject quesPanel;
 public Text nameGame;
 public Light dayLight;
 public $$anonymous$$aterial tile$$anonymous$$at;
 public Image fader;
 float timer;
 float timerInterval = 0.3f;
 float fadeTimer;
 float fadeInterval;

 Color col;

 Color camColor;
 Color camColorBlack;
 float camLerpTimer;
 float camLerpInterval = 1f;
 bool camColorLerp = false;
 int direction = 1;

 Color[] tile$$anonymous$$atDay;
 Color tile$$anonymous$$atNight;
 int actTileColor;

 float daytimeTimer;
 float dayTimeInterval = 15f;

 public enum GameState {
     fadeblackout,
     menu, 
     game,
     ques1,
     exit,
 };
 public GameState gameState;

 void Awake() {
     camColor = new Color (0.75f, 0.75f, 0.75f);
     camColorBlack = new Color (0, 0, 0);

     actTileColor = 0;
     tile$$anonymous$$atDay = new Color[3];
     tile$$anonymous$$atDay[0] = new Color (10/256f, 139/256f, 203/256f);
     tile$$anonymous$$atDay[1] = new Color (10/256f, 200/256f, 20/256f);
     tile$$anonymous$$atDay[2] = new Color (220/256f, 170/256f, 45/256f);
     tile$$anonymous$$atNight = new Color (0, 8/256f, 11/256f);
     tile$$anonymous$$at.color = tile$$anonymous$$atDay [0];

     gameState = GameState.fadeblackout;

     menuPanel.SetActive (true);
     rulePanel.SetActive (false);
     exitPanel.SetActive (false);
     quesPanel.SetActive (false);
 }
     
 void Update () {

     if (Input.Get$$anonymous$$eyDown ($$anonymous$$eyCode.Escape)) {
         if (gameState == GameState.game)
             Time.timeScale = 0;
         gameState = GameState.exit;
         exitGame();
     }
     switch (gameState) {
     case GameState.fadeblackout:
         col = fader.color;
         col.a -= 0.01f;
         if (col.a <= 0) {
             col.a = 0;
             fader.gameObject.SetActive(false);
             gameState = GameState.menu;
         }
         fader.color = col;
         break;

     case GameState.menu:
         break;

     case GameState.game:
         timer += Time.deltaTime;
         if (timer >= timerInterval) {
             timer -= timerInterval;
         }

         daytimeTimer += Time.deltaTime;
         if (daytimeTimer > dayTimeInterval) {
             daytimeTimer -= daytimeTimer;
             camColorLerp = true;
             camLerpTimer = 0;
         }

         if (camColorLerp) {
             camLerpTimer += Time.deltaTime;
             float percent = camLerpTimer / camLerpInterval;
             if (direction == 1) {
                 Camera.main.backgroundColor = Color.Lerp (camColor, camColorBlack, percent);
                 tile$$anonymous$$at.color = Color.Lerp (tile$$anonymous$$atDay [actTileColor], tile$$anonymous$$atNight, percent);
                 dayLight.intensity = 1 - percent;
             } else {
                 Camera.main.backgroundColor = Color.Lerp (camColorBlack, camColor, percent);
                 tile$$anonymous$$at.color = Color.Lerp (tile$$anonymous$$atNight, tile$$anonymous$$atDay [actTileColor], percent);
                 dayLight.intensity = percent;
             }
             if (percent > 0.98f) {
                 camLerpTimer = 1;
                 direction *= -1;
                 camColorLerp = false;
                 if (direction == -1)
                     actTileColor = Random.Range (0, tile$$anonymous$$atDay.Length);
             }
         }
         break;
     case GameState.ques1:
         break;
     }
 }'

 public bool inGame() {
         if (gameState == GameState.game)
             return true;
         else
             return false;
     }
     public void playGame() {
         menuPanel.SetActive (false);
         gameState = GameState.game;
     }
 
     public void showRules() {
         menuPanel.SetActive (false);
         rulePanel.SetActive (true);
     }
 
     public void exitGame() {
         menuPanel.SetActive (false);
         exitPanel.SetActive (true);
     }
 
 
     public void exitRules() {
         menuPanel.SetActive (true);
         rulePanel.SetActive (false); 
         gameState = GameState.menu;
     }
     public void quitGame() {
         Application.Quit ();
     }
 
     public void quesGame (){
         gameState = GameState.ques1;
         quesPanel.SetActive (true);
     }
     public void respondQues(){
         Destroy (transform.gameObject);
         quesPanel.SetActive (false);
         gameState = GameState.game;
     }
     public void ques1(){
         quesPanel.SetActive (false);
         gameState = GameState.game;
     }
     public void ques2(){
         quesPanel.SetActive (false);
         gameState = GameState.game;
     }
 }