WebClient doesn't work in apk when I try to read a text from file.txt which is on a server

Good evening. I would like to read a text from a txt-file which is on a server (like https://example-files.online-convert.com/document/txt/example.txt). In Editor it works correctly, but in a build for Android it throws an exception. I have also put "required" instead of "auto" in player settings.

I have two scripts, the script ShowingTheTextFromASevrer is hung on the Main Camera. Also there is a Text (TextMeshProUGUI) on the screen. In a build I see "An exception occured during a WebClient request" on the screen.

How to fix it?

Code (CSharp):

1. using System.Net;
2. using System.IO;
3. using UnityEngine;
4.  
5. public abstract class GettingTextFromAServer : MonoBehaviour
6. {
7.    public string GetTheTextFromAServer(string url)
8.    {
9.        WebClient client = new WebClient();
10.        Stream stream = client.OpenRead(url);
11.        StreamReader reader = new StreamReader(stream);
12.        return reader.ReadToEnd();
13.    }
14. }

Code (CSharp):

1. using UnityEngine;
2. using TMPro;
3.  
4. public class ShowingTheTextFromASevrer : GettingTextFromAServer
5. {
6.    [SerializeField] private TextMeshProUGUI TextOnTheScreen;
7.  
8.    private void Start()
9.    {
10.        TextOnTheScreen.text = "";
11.        string TextFromTheServer;
12.        try
13.        {
14.            TextFromTheServer = GetTheTextFromAServer("https://example-files.online-convert.com/document/txt/example.txt");
15.            Debug.Log(TextFromTheServer);
16.            TextOnTheScreen.text += TextFromTheServer;
17.        }
18.        catch (System.Exception AnyException)
19.        {
20.            TextOnTheScreen.text += AnyException.Message;
21.        }
22.    }
23. }

Maybe, I should modify the mainfest. I have found it, it is:

Code (csharp):

1. <?xml version="1.0" encoding="utf-8"?>
2. <manifest
3.    xmlns:android="http://schemas.android.com/apk/res/android"
4.    package="com.unity3d.player"
5.    xmlns:tools="http://schemas.android.com/tools">
6.    <application>
7.        <activity android:name="com.unity3d.player.UnityPlayerActivity"
8.                  android:theme="@style/UnityThemeSelector">
9.            <intent-filter>
10.                <action android:name="android.intent.action.MAIN" />
11.                <category android:name="android.intent.category.LAUNCHER" />
12.            </intent-filter>
13.            <meta-data android:name="unityplayer.UnityActivity" android:value="true" />
14.        </activity>
15.    </application>
16. </manifest>

Where should I put

Code (csharp):

1. <uses-permission android:name="android.permission.INTERNET"/>
2. <uses-permission android:name="android.permission.ACCESS_NETWORK_STATE" />

or analogical?

UPD-2:
I have solved that.
1) In the manifest

Code (csharp):

1. <permission android:name="android.permission.INTERNET"/>
2. <permission android:name="android.permission.ACCESS_NETWORK_STATE"/>

should be put above the "<application>" tag.
2) The app should be signed with keycode (like we do before the publication to Play Market) to work.