Firebase: There was an unknown error while processing the request. Try again. [closed]

Answer 1

I've been using Firefox along with the Disconnect add-on. In my case, adding Firebase webpage to the whitelist helped resolving the problem.

Answer 2

What I did was sign out from Firebase and sign back in again. This worked.

The project was already created. The problem occurred because maybe the Firebase console was unable to sync or refresh, but signing out and back in worked for me. Try that.