Crashlytics timed out during initialization

When I run my Android app with Crashlytics, it hangs at startup, and I get a TimeoutException. Then, when I try to crash my app, I get another TimeoutException, with the message CrashlyticsCore: Failed to execute task.
The crash doesn't appears on my Firebase console.

I set up Crashlytics Firebase's tutorial, and I do not have a Fabric account.
I also followed this commit, making me add the gms.google-services plugin.

Thanks for your help.

Is Crashlytics deprecated?

Old versions of your app still using the Fabric Crashlytics SDK will not break once it's deprecated, however they will no longer submit crash reports. But it seems like it will just continue to work as per normal after this date until further notice.

Is Crashlytics real time?

Firebase Crashlytics, a real time crash reporting tool, helps you prioritize and fix your most pervasive crashes based on the impact on real users. Crashlytics also easily integrates into your Android, iOS, macOS, tvOS, and watchOS apps.

I had the same problem today. Downgrading didn't work for me.

Solved by deleting the google-services.json file and reconnecting my app to Firebase again (new google-services.json was generated)