12-17 22:59:49.798  17996-17996/com.applysquare.android.applysquare E/AndroidRuntime﹕ FATAL EXCEPTION: main
    rx.exceptions.OnErrorNotImplementedException
            at rx.Observable$35.onError(Observable.java:8378)
            at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:128)
            at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:97)
            at rx.operators.OperatorConditionalBinding$1.onError(OperatorConditionalBinding.java:68)
            at rx.internal.operators.NotificationLite.accept(NotificationLite.java:144)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:169)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.access$000(OperatorObserveOn.java:66)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:151)
            at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:43)
            at android.os.Handler.handleCallback(Handler.java:725)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5095)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
            at dalvik.system.NativeStart.main(Native Method)
     Caused by: java.lang.NullPointerException
            at com.applysquare.android.applysquare.ui.tutorial.TutorialFragment$3.call(TutorialFragment.java:191)
            at com.applysquare.android.applysquare.ui.tutorial.TutorialFragment$3.call(TutorialFragment.java:80)
            at rx.functions.Functions$3.call(Functions.java:82)
            at rx.internal.operators.OnSubscribeCombineLatest$MultiSourceProducer.onNext(OnSubscribeCombineLatest.java:199)
            at rx.internal.operators.OnSubscribeCombineLatest$MultiSourceRequestableSubscriber.onNext(OnSubscribeCombineLatest.java:248)
            at rx.internal.operators.NotificationLite.accept(NotificationLite.java:147)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.pollQueue(OperatorObserveOn.java:169)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber.access$000(OperatorObserveOn.java:66)
            at rx.internal.operators.OperatorObserveOn$ObserveOnSubscriber$2.call(OperatorObserveOn.java:151)
            at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:43)
            at android.os.Handler.handleCallback(Handler.java:725)
            at android.os.Handler.dispatchMessage(Handler.java:92)
            at android.os.Looper.loop(Looper.java:137)
            at android.app.ActivityThread.main(ActivityThread.java:5095)
            at java.lang.reflect.Method.invokeNative(Native Method)
            at java.lang.reflect.Method.invoke(Method.java:511)
            at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:898)
            at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:665)
            at dalvik.system.NativeStart.main(Native Method)