Module not found: Error: Package path . is not exported from package D:\CWS-website\node_modules\firebase (see exports field in D:\CWS-website\node_modules\firebase\package.json)

This is the error BUT I am imported firebase

 import firebase from 'firebase';

var firebaseApp = firebase.initializeApp({
// MY CREDENTIALS ...
});

var db = firebaseApp.firestore();

export { db };