I wanted to create an app with firebaseDB as a database.
Here's what I did:
Firebase Account:
Realtime Database>> Create DB >> Chosen Test Mode
Under rules, I set the read and write to true
On project Settings>>Service Accounts>>Database secrets - Copied the secrets for FirebaseToken
On mit app inventor, I only use the following components
I changed my FirebaseURL and token from the new firebase project I have created. Right when the project loads on MIT app companion, I encountered this error.
I'm using Android for my App companion, version 2.76
Tried to clear data and cache on app, created a fresh new project but same error persists even if I did not put any blocks yet.
I have tried the "do it" option and this is the result
Error from Companion: Attempt to invoke virtual method 'com.firebase.client.Firebase com.firebase.client.Firebase.child(java.lang.String)' on a null object reference
It seems Missing or Incorrect Firebase Properties, You have not correctly set the Firebase URL and/or the Project Bucket in the Firebase component's properties in the Designer view. If these are left blank or have an invalid value, the component cannot connect to your database, and the object remains null.
Update:
It just doesn't make any sense 
I tried creating a new project on different account, using the same firebase credentials and it worked.
As I have observed, first account (the one which does not work) , every time I add a firebaseDB component, it won't provide a default firebase token and would instantly provide an error.
2nd account(which works), every time I add a firebaseDB component, it will provide its own default FirebaseToken. It still worked even if I already removed the firebaseToken. (retained the same firebaseURL)
