What does "failed to retrieve settings" error on logcat mean and why is Unity Firebase Crashlytics not sending any crash reports?

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The "failed to retrieve settings" error on logcat typically means that Firebase Crashlytics is not able to connect to Firebase services and retrieve the necessary configuration settings. This can happen due to a number of reasons such as network connectivity issues, invalid project configuration, or incorrect credentials.

As a result of this error, Unity Firebase Crashlytics may not be able to send any crash reports. Without the necessary configuration settings, the Crashlytics SDK cannot report any crashes or errors back to Firebase.

To resolve this issue, you may need to check your project configuration settings, ensure that you have a valid network connection, and verify that your Firebase project is properly configured with the correct credentials. You may also need to update your Crashlytics SDK to the latest version.