Crashlyitics not appearing in Firebase

Forget Fabric, it's not required. Just follow instructions in your Firebase console and Firebase documentation: https://firebase.google.com/docs/crashlytics/get-started#android

Don't mess with Fabric console, you should completly remove any calls to Fabric console and configure your project from scratch as Firebase doc says. As soon as you run app correctly configured, you will see Crashlytics panel in your Firebase console