How to FIX Flutter Compile Error on Firebase Auth | Firebase Initializing
Unhandled Exception: [core/duplicate-app] A Firebase App named [DEFAULT] already exists
Unhandled Exception PlatformException, Unable to establish connection on channel, null, null
How to Fix FlutterFlow Firebase Errors [2026 Guide]
Fix Firebase Error in Flutter: [core/not-initialized] Firebase has not been correctly initialized
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Last Updated: August 15, 2026
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