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Exception thrown on Scheduler.Worker thread. Add `onError` handling.
rx.exceptions.OnErrorNotImplementedException: Can't create handler inside thread that has not called Looper.prepare()	at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:386)	at rx.internal.util.InternalObservableUtils$ErrorNotImplementedAction.call(InternalObservableUtils.java:383)	at rx.internal.util.ActionSubscriber.onError(ActionSubscriber.java:44)	at rx.observers.SafeSubscriber._onError(SafeSubscriber.java:157)	at rx.observers.SafeSubscriber.onError(SafeSubscriber.java:120)	at rx.exceptions.Exceptions.throwOrReport(Exceptions.java:204)	at rx.observers.SafeSubscriber.onNext(SafeSubscriber.java:144)	at rx.internal.operators.OperatorSubscribeOn$1$1.onNext(OperatorSubscribeOn.java:53)	at rx.internal.operators.OperatorTake$1.onNext(OperatorTake.java:77)	at rx.internal.operators.OnSubscribeTimerPeriodically$1.call(OnSubscribeTimerPeriodically.java:52)	at rx.Scheduler$Worker$1.call(Scheduler.java:134)	at rx.internal.schedulers.EventLoopsScheduler$EventLoopWorker$2.call(EventLoopsScheduler.java:187)	at rx.internal.schedulers.ScheduledAction.run(ScheduledAction.java:55)