Android webview not generating pdf report on button click

I have created a web app in Android studio using WebView. I have loaded a WordPress site in android WebView. The WordPress site exports a pdf report on a button click When i load it on chrome browser.

The website loaded in chrome

When i click on PDF button shows the window

and

and finally it starts downloading the pdf file

and the generated pdf report looks like:

But the problem occurs when i use the Android App created in WebView. When i click on PDF button it does nothing and i get a Debug log

D/cr_Ime: [InputMethodManagerWrapper.java:59] isActive: true
[InputMethodManagerWrapper.java:68] hideSoftInputFromWindow

I have manifest permission set to

 uses-permission android:name="android.permission.INTERNET"

Code here private static final String WEB_URL = "https://ift.tt/3xYIFwa";

webView = findViewById(R.id.webView);
    
    webView.getSettings().setDomStorageEnabled(true);
    webView.getSettings().setAllowContentAccess(true);
    webView.getSettings().setDatabaseEnabled(true);
    webView.getSettings().setAllowFileAccessFromFileURLs(true);
    webView.getSettings().setAllowUniversalAccessFromFileURLs(true);
    webView.getSettings().setBlockNetworkLoads(false);

    webView.getSettings().setAppCacheMaxSize( 10 * 1024 * 1024 ); // 10MB
    webView.getSettings().setAppCachePath(getApplicationContext().getCacheDir().getAbsolutePath() );
    webView.getSettings().setAllowFileAccess( true );
    webView.getSettings().setAppCacheEnabled( true );
    webView.getSettings().setJavaScriptEnabled( true );
    webView.getSettings().setCacheMode( WebSettings.LOAD_DEFAULT );
    webView.setWebViewClient(new WebViewClient());
    webView.setWebChromeClient(new WebChromeClient());

    webView.getSettings().setJavaScriptEnabled(true);
    webView.loadUrl(WEB_URL);

Please tell is the problem related to manifest file permission or run time permission, Please give a solution.

The Android app that i created in WebView.

from Android webview not generating pdf report on button click