This issue may occur when updating your Firebase settings in the backend. It typically happens when you change the Application ID/Package Name in the backend, but the Firebase project has not been updated accordingly.
To fix this,
- Create a New Firebase Project:
- Use the new Application ID or Package name that matches the one in the backend.
- Download the Configuration File:
- After setting up the Firebase project, download the JSON file (.json).
- Upload the New JSON File to the Backend:
- Replace the existing configuration file in the backend with the new one.
Once completed, the issue should be resolved.