Used version 8.2.3 and 8.2.10 of firebase. Still same error. expo version is 43. Error is coming on running expo start in cmd

import firebase from 'firebase/app';

const firebaseConfig = {
  apiKey: "AIzaSyAh_tcl1uBG72zmb3q-vOO6U7o6U4M6ueQ",
  authDomain: XXX,
  projectId: XXX,
  storageBucket: XXX,
  messagingSenderId: XXX,
  appId: XXX
};

if(!firebase.apps.length){
  firebase.initializeApp(firebaseConfig);
}

export default firebase.database();