TypeError: null is not an object (evaluating 'n.default.configureProps') React Native Jitsi Meet

I am facing an issue in my live react native app with JitsiMeet integration. I am using this library for jitsi-meet integration in my app. Now whenever I click on button to start video call via jitsi-meet,my app always crash with below logcats:

E/ReactNativeJS: TypeError: null is not an object (evaluating 'n.default.configureProps')
2019-11-30 11:54:10.587 28571-29151/com.telehealthcare E/ReactNativeJS: Invariant Violation: Module AppRegistry is not a registered callable module (calling runApplication)
2019-11-30 11:54:10.598 28571-29152/com.telehealthcare E/AndroidRuntime: FATAL EXCEPTION: mqt_native_modules
    Process: com.telehealthcare, PID: 28571
    com.facebook.react.common.JavascriptException: TypeError: null is not an object (evaluating 'n.default.configureProps'), stack:
    s@555:2197
    <unknown>@555:2245
    v@2:1474
    <unknown>@500:734
    v@2:1474
    <unknown>@499:206
    v@2:1474
    <unknown>@498:271
    v@2:1474
    <unknown>@494:268
    v@2:1474
    <unknown>@493:1546
    v@2:1474
    <unknown>@383:171
    v@2:1474
    <unknown>@6:58
    v@2:1474
    d@2:876
    global code@1124:4

        at com.facebook.react.modules.core.ExceptionsManagerModule.reportException(ExceptionsManagerModule.java:71)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.facebook.react.bridge.JavaMethodWrapper.invoke(JavaMethodWrapper.java:371)
        at com.facebook.react.bridge.JavaModuleWrapper.invoke(JavaModuleWrapper.java:150)
        at com.facebook.react.bridge.queue.NativeRunnable.run(Native Method)
        at android.os.Handler.handleCallback(Handler.java:789)
        at android.os.Handler.dispatchMessage(Handler.java:98)
        at com.facebook.react.bridge.queue.MessageQueueThreadHandler.dispatchMessage(MessageQueueThreadHandler.java:26)
        at android.os.Looper.loop(Looper.java:164)
        at com.facebook.react.bridge.queue.MessageQueueThreadImpl$4.run(MessageQueueThreadImpl.java:225)
        at java.lang.Thread.run(Thread.java:764)
2019-11-30 11:54:10.601 28571-29152/com.telehealthcare E/JitsiMeetSDK: JitsiMeetUncaughtExceptionHandler FATAL ERROR

Here is my videocall screen:

import React from 'react';
import { View } from 'react-native';
import JitsiMeet, { JitsiMeetView } from 'react-native-jitsi-meet';

class VideoCallScreen extends React.Component {
  constructor(props) {
    super(props);
    this.onConferenceTerminated = this.onConferenceTerminated.bind(this);
    this.onConferenceJoined = this.onConferenceJoined.bind(this);
    this.onConferenceWillJoin = this.onConferenceWillJoin.bind(this);
  }

  componentDidMount() {
    setTimeout(() => {
      // this.setState({data:this.props.navigation.state.params.data});  
      const url = this.props.navigation.state.params.callUrl;
      var isAudio = this.props.navigation.state.params.isAudio;

      console.log("VideoCallScreen url: " + url+"& isAudio: " + isAudio);

      if(isAudio){
        JitsiMeet.audioCall(url);
      } else {
        JitsiMeet.call(url);
      }
      /* You can programmatically end the call with JitsiMeet.endCall() */
    }, 1000);
  }

  onConferenceTerminated(nativeEvent) {
    /* Conference terminated event */
    console.log('onConferenceTerminated');
  }

  onConferenceJoined(nativeEvent) {
    /* Conference joined event */
    console.log('onConferenceJoined');
  }

  onConferenceWillJoin(nativeEvent) {
    /* Conference will join event */
    console.log('onConferenceWillJoin');
  }

  render() {
    return (
      <View style={{ backgroundColor: 'black',flex: 1 }}>
        <JitsiMeetView onConferenceTerminated={this.onConferenceTerminated} onConferenceJoined={this.onConferenceJoined} onConferenceWillJoin={this.onConferenceWillJoin} style={{ flex: 1, height: '100%', width: '100%' }} />
      </View>
    );
  }
}
export default VideoCallScreen;

Here is the code of button click:

var url = "https://my.url.app/" + finalName;
var {navigate} = this.props.navigation;
navigate('VideoCallScreen', {callUrl:url, isAudio:this.state.isAudioEnable})

Please help me where I am going wrong. Any help will be appreciated.

EDIT

Now, according to react-native-jitsi-meet manual installation guidelines, I added below code to my app/build.gradle:

project.ext.react = [
    entryFile: "index.js",
    bundleAssetName: "app.bundle",// This line
]

Added this code to MainApplication.java:

@Override
          protected @Nullable String getBundleAssetName() {
              return "app.bundle";
          }

Now, app is always crashes on start with this logs:

java.lang.RuntimeException: Unable to load script. Make sure you're either running a Metro server (run 'react-native start') or that your bundle 'app.bundle' is packaged correctly for release.
        at com.facebook.react.bridge.CatalystInstanceImpl.jniLoadScriptFromAssets(Native Method)
        at com.facebook.react.bridge.CatalystInstanceImpl.loadScriptFromAssets(CatalystInstanceImpl.java:227)
        at com.facebook.react.bridge.JSBundleLoader$1.loadScript(JSBundleLoader.java:28)
        at com.facebook.react.bridge.CatalystInstanceImpl.runJSBundle(CatalystInstanceImpl.java:261)
        at com.facebook.react.ReactInstanceManager.createReactContext(ReactInstanceManager.java:1175)
        at com.facebook.react.ReactInstanceManager.access$1000(ReactInstanceManager.java:125)
        at com.facebook.react.ReactInstanceManager$5.run(ReactInstanceManager.java:951)
        at java.lang.Thread.run(Thread.java:764)

Any solution for this error?