TypeError: Cannot read property 'stack' of undefined for Action on google node module

I am using Firebase cloud functions as webhook for my action-on-google dialogflow fulfilment.

I am showing only part of My index.js file as below

process.env.DEBUG = 'actions-on-google:*';

var requestcall = require('request');
var date = require('date-and-time');
var promise = require('promise');
var AmazonDateParser = require('amazon-date-parser');
var moment = require('moment-timezone');

var accountnum;
var accessToken;
var timePeriod;
var acctnums =[];

const OUT_CONTEXT = 'output_context';
const ACCOUNT_ARG = 'info';
const ACCOUNT_NUM = 'myAccountNum';
const AccountNums = 'AccountNums';
const CURRENCY_SYMBOL = 'CurrencySymbol';
const TIME_ZONE = 'TimeZone';
const STATS_ARG = 'nextStatsData';



const {dialogflow} = require('actions-on-google');
const functions = require('firebase-functions');

const {
  SimpleResponse,
  BasicCard,
  Image,
  Suggestions,
  Button
} = require('actions-on-google');

const app = dialogflow(

{debug: true,clientId: 'xxxxxxxxxxx.apps.googleusercontent.com'});

app.intent('Default Welcome Intent', (conv) => {
   
  
  console.log('Request headers: ' + JSON.stringify(conv.headers));
  console.log('Request body: ' + JSON.stringify(conv.body));
  accessToken =conv.body.originalDetectIntentRequest.payload.user.accessToken;
   console.log('accessToken: ' + accessToken);
 
  if (accessToken !== null) {
      
      
      return  getaccountDetails(conv).then((entity)=>{
      return getMessageFromAccount(entity,conv);
      });
  
  }
  else{
      
     return conv.close(new SignIn('To get your account details'));
   
  }
 
  
  });
exports.stats = functions.https.onRequest(app);
 

My package.json file is as below

  "description": "Cloud Functions for Firebase",
  "scripts": {
    "serve": "firebase serve --only functions",
    "shell": "firebase experimental:functions:shell",
    "start": "npm run shell",
    "deploy": "firebase deploy --only functions",
    "logs": "firebase functions:log"
  },
  "dependencies": {
    "actions-on-google": "^2.12.0",
    "amazon-date-parser": "^0.1.5",
    "date-and-time": "^0.6.3",
    "dialogflow": "^0.6.0",
    "firebase-admin": "^6.5.1",
    "firebase-functions": "^3.9.0",
    "moment-timezone": "^0.5.31",
    "node-pre-gyp": "^0.15.0",
    "promise": "^8.1.0",
    "request": "^2.88.2"
  },
  "engines": {
    "node": "10"
  },
  "devDependencies": {
    "firebase-functions-test": "^0.2.1"
  },
  "private": true,
  "version": "1.0.0",
  "main": "index.js",
  "author": "",
  "license": "ISC"
}

I am getting the following error while testing my actions-on-google

    at standard.then.catch (/workspace/node_modules/actions-on-google/dist/framework/express.js:37:32)
    at process._tickCallback (internal/process/next_tick.js:68:7)

Error is not in my index.js. The error is in actions-on-google npm modules library at express.js.

I deleted my node modules and installed again and rebuild the code. still same error coming.

Please help me in solving this issue.

[Siva-Alexa]

@Fleker can you drop your mail, i will send you my whole code zip folder so that you can check that. if you have problem sharing your mail publicly please reply to my mail i will forward you.

my mail id : [e-mail].

[Fleker]

I am not encountering this error when trying this on my own example project.