에피소드 리스트 에러

[Pluu]

FATAL EXCEPTION: main
Process: com.pluu.webtoon, PID: 11915
java.lang.NullPointerException: value is null
    at io.reactivex.internal.functions.ObjectHelper.requireNonNull(ObjectHelper.java:39)
    at io.reactivex.Single.just(Single.java:640)
    at com.pluu.webtoon.ui.EpisodeFragment.lambda$getRequestApi$3(EpisodeFragment.java:247)
    at com.pluu.webtoon.ui.EpisodeFragment$$Lambda$4.call(Unknown Source)
    at io.reactivex.internal.operators.single.SingleDefer.subscribeActual(SingleDefer.java:36)
    at io.reactivex.Single.subscribe(Single.java:2657)
    at io.reactivex.internal.operators.single.SingleToFlowable.subscribeActual(SingleToFlowable.java:37)
    at io.reactivex.Flowable.subscribe(Flowable.java:12885)
    at io.reactivex.internal.operators.flowable.FlowableZip$ZipCoordinator.subscribe(FlowableZip.java:129)
    at io.reactivex.internal.operators.flowable.FlowableZip.subscribeActual(FlowableZip.java:79)
    at io.reactivex.Flowable.subscribe(Flowable.java:12885)
    at io.reactivex.internal.operators.flowable.FlowableSingleSingle.subscribeActual(FlowableSingleSingle.java:38)
    at io.reactivex.Single.subscribe(Single.java:2657)
    at io.reactivex.internal.operators.single.SingleSubscribeOn$SubscribeOnObserver.run(SingleSubscribeOn.java:89)
    at io.reactivex.Scheduler$1.run(Scheduler.java:134)
    at io.reactivex.internal.schedulers.ScheduledRunnable.run(ScheduledRunnable.java:59)
    at io.reactivex.internal.schedulers.ScheduledRunnable.call(ScheduledRunnable.java:51)
    at java.util.concurrent.FutureTask.run(FutureTask.java:237)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:269)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1113)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:588)
    at java.lang.Thread.run(Thread.java:818)