Page not showing in webview?

Question

Android

Comrades! Greetings!
I am learning to sculpt for Andryusha's robot. Just started - already stuck. All by examples, everything is the same everywhere - I'm trying to load a page of an external site into webview. When debugging on the phone, writes "The web page is not available." The Internet is on on the phone (I specifically launched Telegram to check it), but the link does not want to open in the application. Rights also put INTERNET. What could be the problem?
Just in case, here is the code:

package com.example.tihoho.mytestapplication;

import android.app.Activity;
//import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.view.View;
import android.view.Window;
import android.view.WindowManager;
import android.webkit.*;

public class MainActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        requestWindowFeature(Window.FEATURE_NO_TITLE);
        getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
        setContentView(R.layout.activity_main);

        WebView mWebView = (WebView) findViewById(R.id.webView);
        
        String url = "https://ya.ru";
        
        mWebView.setWebViewClient(new WebViewClient() {
            @Override
            public boolean shouldOverrideUrlLoading(WebView view, String url) {
                view.loadUrl(url);
                return true;
            }
        });

        WebSettings set =  mWebView.getSettings();
        set.setJavaScriptEnabled(true);
        mWebView.loadUrl(url);
        mWebView.setScrollBarStyle(View.SCROLLBARS_INSIDE_OVERLAY);
    }

    protected void isInEditMode()
    {}

}

Answer 1

The problem was that 2 days before that I had set up work with the Internet through a proxy with a certificate tie. All apps worked but mine didn't. removed the certificate, removed the proxy - everything worked.