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    Expert tip

    This is caused by using legacy commands from older versions of Firebase. Look for the new documentation and try using only the new SDK

Solutions on the web

via GitHub by kcfgl
, 1 year ago
FirebaseApp with name [DEFAULT] doesn't exist.
via Stack Overflow by Kiko
, 7 months ago
Default FirebaseApp is not initialized in this process null. Make sure to call FirebaseApp.initializeApp(Context) first.
via Stack Overflow by san g
, 1 year ago
FirebaseApp with name [DEFAULT] doesn't exist.
Empty query.