Payment Failed

[harikanammi]

Hi, i am using this module in sample app. But i am getting error page like below image.
Please give me any suggestion. Thankyou.
here is my code:

import React, { Component } from 'react'
import { Platform, StyleSheet, Text, View, DeviceEventEmitter, NativeModules, NativeEventEmitter, TouchableOpacity } from 'react-native'
import paytm from 'react-native-paytm'
const instructions = Platform.select({
  ios: 'Press Cmd+R to reload,\n' + 'Cmd+D or shake for dev menu',
  android: 'Double tap R on your keyboard to reload,\n' + 'Shake or press menu button for dev menu'
})
const paytmConfig = {
  MID: 'sample123456',
  WEBSITE: 'APP_STAGING',
  CHANNEL_ID: 'APP',
  INDUSTRY_TYPE_ID: 'Retail',
  CALLBACK_URL: 'https://securegw-stage.paytm.in/theia/paytmCallback?ORDER_ID=' 
}

type Props = {}
export default class App extends Component<Props> {
  componentWillMount() {
    if (Platform.OS == 'ios') {
      const { RNPayTm } = NativeModules
      const emitter = new NativeEventEmitter(RNPayTm)
      emitter.addListener('PayTMResponse', this.onPayTmResponse)
    } else {
      DeviceEventEmitter.addListener('PayTMResponse', this.onPayTmResponse)
    }
  }
  onPayTmResponse(response) {
    alert('RESPONSE')
    // Process Response
    // response.response in case of iOS
    // reponse in case of Android
    console.log(response)
  }
  runTransaction(amount, customerId, orderId, mobile, email, checkSum) {
    const callbackUrl = `${paytmConfig.CALLBACK_URL}${150}`

    const details = {
      mode: 'Staging', 
      mid: paytmConfig.MID,
      industryType: paytmConfig.INDUSTRY_TYPE_ID,
      website: paytmConfig.WEBSITE,
      channel: paytmConfig.CHANNEL_ID,
      amount: '200',
      orderId: '150', 
      email: '123456@gmail.com', 
      phone: '9876543210',
      custId: 'PO23Jf4', 
      checksumhash: 'checkSum',
      callback: callbackUrl
    }

    paytm.startPayment(details)
  }
  render() {
    return (
      <View style={styles.container}>
        <Text style={styles.welcome}>Welcome to React Native!</Text>
        <Text style={styles.instructions}>To get started, edit App.js</Text>

        <Text style={styles.instructions}>{instructions}</Text>
        <TouchableOpacity onPress={this.runTransaction.bind(this)}>
          <Text style={[styles.welcome, { color: 'green', fontWeight: '800' }]}>Paytm</Text>
        </TouchableOpacity>
      </View>
    )
  }
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
    justifyContent: 'center',
    alignItems: 'center',
    backgroundColor: '#F5FCFF'
  },
  welcome: {
    fontSize: 20,
    textAlign: 'center',
    margin: 10
  },
  instructions: {
    textAlign: 'center',
    color: '#333333',
    marginBottom: 5
  }
})

Here is my screenshot:

[kunal886496]

is this done?