How can I fix this CrashlyticsMissingDependencyException?

Question

I have been using the latest Crashlytics (Fabric integration) for a while. But recently I encountered the following crash error due to missing dependency although I didn't change anything about Crashlytics configurations.

any idea?

02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .   \ |  | /
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .    \    /
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     \  /
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .      \/
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ This app relies on Crashlytics. Please sign up for access at https://fabric.io/sign_up,
    install an Android build tool and ask a team member to invite you to this app's organization.
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .      /\
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     /  \
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .    /    \
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .   / |  | \
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .     |  |
02-08 22:18:00.935  18887-18887/? E/Fabric﹕ .
02-08 22:18:00.935  18887-18887/? E/AndroidRuntime﹕ FATAL EXCEPTION: main
    Process: com.example.android.staging, PID: 18887
    java.lang.RuntimeException: Unable to create application com.example.android.App: io.fabric.sdk.android.services.concurrency.UnmetDependencyException: com.crashlytics.android.CrashlyticsMissingDependencyException:
    This app relies on Crashlytics. Please sign up for access at https://fabric.io/sign_up,
    install an Android build tool and ask a team member to invite you to this app's organization.
            at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4734)
            at android.app.ActivityThread.access$1600(ActivityThread.java:171)
            at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1357)
            at android.os.Handler.dispatchMessage(Handler.java:102)
            at android.os.Looper.loop(Looper.java:157)
            at android.app.ActivityThread.main(ActivityThread.java:5506)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:515)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1265)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1081)
            at dalvik.system.NativeStart.main(Native Method)

Answer 1

I have added the following codes before I actually installed Fabric/Crashlytics:

debug {
    ext.enableCrashlytics = false
}

Removing it before the first run with Crashlytics solved the problem. The problem no longer occurs after the first run.