App Crashes after navigating to WebViewScaffold()

I have a simple application where when I click a button, a web view should open with the default URL. When I navigate to the web view and come back, if navigate again to the web view, web view opens and then crashes the whole application.

Here is my code
```
import 'package:flutter/material.dart';
import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';

class MethodsPage extends StatefulWidget {
@override
_MethodsPageState createState() => _MethodsPageState();
}

class _MethodsPageState extends State {
// final flutterWebViewPlugin = FlutterWebviewPlugin();
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
centerTitle: true,
title: Text(
'Methods',
style: TextStyle(color: Colors.black),
)),
body: Center(child: RaisedButton(
child: Text('Open View'), onPressed: openWebView,)),
);
}

void openWebView() {
Navigator.push(
context, MaterialPageRoute(builder: (context) => WebUi()));
}

}

class WebUi extends StatelessWidget {
final flutterWebViewPlugin = FlutterWebviewPlugin();
@override
Widget build(BuildContext context) {
return WebviewScaffold(
appBar: AppBar(centerTitle: true,title: Text('Web UI'),),
url: 'https://www.google.com',
withZoom: true,
bottomNavigationBar: BottomAppBar(
child: Row(
children: [
IconButton(
icon: const Icon(Icons.arrow_back_ios),
onPressed: () {
flutterWebViewPlugin.goBack();
},
),
IconButton(
icon: const Icon(Icons.arrow_forward_ios),
onPressed: () {
flutterWebViewPlugin.goForward();
},
),
IconButton(
icon: const Icon(Icons.autorenew),
onPressed: () {
flutterWebViewPlugin.reload();
},
),
],
),
),
);
}
}

```

Error: Received

> F/google-breakpad(21220): -----BEGIN BREAKPAD MICRODUMP-----
> F/google-breakpad(21220): V AndroidWebView:69.0.3497.100
> F/google-breakpad(21220): O A x86 04 i686 google/sdk_gphone_x86_arm/generic_x86_arm:9/PSR1.180720.117/5875966:user/release-keys
> F/google-breakpad(21220): P browser
> F/google-breakpad(21220): R 0000000B SIGSEGV 00000000
> F/google-breakpad(21220): G
> F/google-breakpad(21220): H 12C00000 FFF03000 00DD 3D313000 763FC000 0C:28 0D:12 0E:0A 0F:0F 10:11 11:13 12:56 13:0A 16:02 1B:01 1C:02 1D:01
> F/google-breakpad(21220): S 0 D2087FCC D2087000 00008000
> F/google-breakpad(21220): S D2087000
> ...........
> F/google-breakpad(21220): -----END BREAKPAD MICRODUMP-----
> W/google-breakpad(20716): ### ### ### ### ### ### ### ### ### ### ### ### ###
> W/google-breakpad(20716): Chrome build fingerprint:
> W/google-breakpad(20716): 69.0.3497.100
> W/google-breakpad(20716): 349710017
> W/google-breakpad(20716): ### ### ### ### ### ### ### ### ### ### ### ### ###
> F/libc (20716): Fatal signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0 in tid 20808 (RenderThread), pid 20716 (resssdriverlite)
> *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
> Build fingerprint: 'google/sdk_gphone_x86_arm/generic_x86_arm:9/PSR1.180720.117/5875966:user/release-keys'
> Revision: '0'
> ABI: 'x86'
> pid: 20716, tid: 20808, name: RenderThread >>> com.myapp<<<
> signal 11 (SIGSEGV), code 1 (SEGV_MAPERR), fault addr 0x0
> Cause: null pointer dereference
> eax ec3bf900 ebx e2d85e2c ecx e2c5ba58 edx d2088030
> edi e2eae8f4 esi d2088010
> ebp c50f3000 esp d2087fcc eip 00000000
> backtrace:
> #00 pc 00000000
>

Any assistance would be really helpful.