Problem
Firestore now changed they way date object are fetched.
And you may get an error screen like this one

Solution
In App/Datapoints/Firebase.js at the end of the file, before export default firebase add this
/**
* Fix for latest version on Firestore
*/
const firestore=firebase.firestore();
const settings={
timestampsInSnapshots:true
}
firestore.settings(settings);
//END FIX