Unity Text(Legacy) disapears on WebGL build

Question

I am trying to make a FlappyBird on WebGL with Unity. I made scores system, and there is no bug finded while runing on unity editor, but when I build with WebGL, Text don't shows up. Only legacy Text (Not TextMeshPro) causes this problm, so it would be helpful too if there is a way to use TextMeshPro. https://r0k0r.github.io/FlappyBirdWebGL is my game link, and https://github.com/R0K0R/FlappyBirdWebGL is my github link. I don't know this will help, but I am currently coding with ubuntu.

this is my Score.cs code that returns current score:

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

public class Score : MonoBehaviour
{
    public static int score = 0;

    // Start is called before the first frame update
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        
    }

    void OnTriggerEnter2D(){
        score++;
    }

    public static int returnScore(){return score;}
}

and this is my ApplyScore.cs code that applys score to text gameobject.

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

public class ApplyScore : MonoBehaviour
{

    public Text ScoreText;

    // Start is called before the first frame update
    void Start()
    {
        ScoreText.text = "0";
    }

    // Update is called once per frame
    void Update()
    {
        ScoreText.text = Score.returnScore().ToString();
    }
}

this is what it looks like

and this is what it should look like