Error: Cannot find module 'core-js/modules/es7.object.entries'

I am trying to serve an executable schema. I get the following error while using version 2.0.2. Works totally fine with version 2.0.0.

Error: Cannot find module 'core-js/modules/es7.object.entries'
    at Object.<anonymous> (/home/wawhal/oss/schema-stitching-examples/multiple-remote-graphql-apis/node_modules/apollo-upload-server/lib/middleware.js:14:1)

Here is the code:

import {
  makeRemoteExecutableSchema,
  introspectSchema,
  mergeSchemas
} from 'graphql-tools';
import { HttpLink } from 'apollo-link-http';
import { ApolloServer } from 'apollo-server';
import fetch from 'node-fetch';

// secret keys
const GITHUB_TOKEN = process.env.GITHUB_TOKEN || 'github-token';
const X_HASURA_ACCESS_KEY = process.env.X_HASURA_ACCESS_KEY || '<key>';

// graphql API metadata
const graphqlApis = [
  {
    uri: 'https://api.github.com/graphql',
    headers: { 'Authorization': `Bearer ${GITHUB_TOKEN}` }
  },
  {
    uri: 'https://api1.com/graphql',
    headers: { 'x-hasura-access-key': X_HASURA_ACCESS_KEY }
  }
];

// create executable schemas from remote GraphQL APIs
const createRemoteExecutableSchemas = async () => {
  let schemas = [];
  for (const api of graphqlApis) {
    const link = new HttpLink({
      uri: api.uri,
      headers: api.headers,
      fetch
    });
    const remoteSchema = await introspectSchema(link);
    const remoteExecutableSchema = makeRemoteExecutableSchema({
      schema: remoteSchema,
      link
    });
    schemas.push(remoteExecutableSchema);
  }
  return schemas;
};

const createNewSchema = async () => {
  const schemas = await createRemoteExecutableSchemas();
  console.log(schemas);
  return mergeSchemas({
    schemas
  });
};

const runServer = async () => {
  console.log('here');
  // Get newly merged schema
  const schema = await createNewSchema();
  // start server with the new schema
  const server = new ApolloServer({
    schema
  });
  server.listen().then(({url}) => {
    console.log(`Running at ${url}`);
  });
};

try {
  console.log('here');
  runServer();
} catch (err) {
  console.error(err);
}

/label bug

[fungiboletus]

A temporary workaround : npm install core-js

[zainulabidin302]

After upgrading to 2.3.3, I got the same error again. Downgrading to 2.0.4 fixed it.