[Bug] Extensions using Guya reader aren't working

[NoaHimesaka1873]

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Device information

• Tachidesk version: v0.6.3-r1087
• Server Operating System: Oracle Linux 8.5
• Server Desktop Environment: N/A
• Server JVM version: bundled with docker
• Client Operating System: iPadOS 15.4
• Client Web Browser: Safari whatever version bundled with iPadOS 15.4

Steps to reproduce

1. Just try to read any chapter from extensions using Guya reader

Expected behavior

Images should be displayed.

Actual behavior

Can't load chapter info with the log:

23:19:58.537 [DefaultDispatcher-worker-4] WARN  io.javalin.Javalin - Uncaught exception
org.json.JSONException: No value for 
        at org.json.JSONObject.get(JSONObject.java:505)
        at org.json.JSONObject.getJSONArray(JSONObject.java:705)
        at eu.kanade.tachiyomi.multisrc.guya.Guya.parsePageFromJson(Unknown Source)
        at eu.kanade.tachiyomi.multisrc.guya.Guya.pageListParse(Unknown Source)
        at eu.kanade.tachiyomi.multisrc.guya.Guya.access$pageListParse(Unknown Source)
        at eu.kanade.tachiyomi.multisrc.guya.Guya$fetchPageList$2.call(Unknown Source)
        at eu.kanade.tachiyomi.multisrc.guya.Guya$fetchPageList$2.call(Unknown Source)
        at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:69)
        at rx.internal.operators.OnSubscribeDoOnEach$DoOnEachSubscriber.onNext(OnSubscribeDoOnEach.java:101)
        at eu.kanade.tachiyomi.network.OkHttpExtensionsKt$asObservable$1$requestArbiter$1.request(OkHttpExtensions.kt:34)
        at rx.Subscriber.setProducer(Subscriber.java:211)
        at rx.internal.operators.OnSubscribeMap$MapSubscriber.setProducer(OnSubscribeMap.java:102)
        at rx.Subscriber.setProducer(Subscriber.java:205)
        at eu.kanade.tachiyomi.network.OkHttpExtensionsKt.asObservable$lambda-0(OkHttpExtensions.kt:54)
        at rx.Observable.unsafeSubscribe(Observable.java:10327)
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:41)
        at rx.internal.operators.OnSubscribeDoOnEach.call(OnSubscribeDoOnEach.java:30)
        at rx.Observable.unsafeSubscribe(Observable.java:10327)
        at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:48)
        at rx.internal.operators.OnSubscribeMap.call(OnSubscribeMap.java:33)
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:48)
        at rx.internal.operators.OnSubscribeLift.call(OnSubscribeLift.java:30)
        at rx.Observable.subscribe(Observable.java:10423)
        at rx.Observable.subscribe(Observable.java:10390)
        at suwayomi.tachidesk.manga.impl.util.lang.RxCoroutineBridgeKt.awaitOne(RxCoroutineBridge.kt:27)
        at suwayomi.tachidesk.manga.impl.util.lang.RxCoroutineBridgeKt.awaitSingle(RxCoroutineBridge.kt:23)
        at suwayomi.tachidesk.manga.impl.chapter.ChapterForDownload.fetchPageList(ChapterForDownload.kt:71)
        at suwayomi.tachidesk.manga.impl.chapter.ChapterForDownload.asDownloadReady(ChapterForDownload.kt:44)
        at suwayomi.tachidesk.manga.impl.chapter.ChapterForDownloadKt.getChapterDownloadReady(ChapterForDownload.kt:32)
        at suwayomi.tachidesk.manga.controller.MangaController$chapterRetrieve$1.invokeSuspend(MangaController.kt:130)
        at kotlin.coroutines.jvm.internal.BaseContinuationImpl.resumeWith(ContinuationImpl.kt:33)
        at kotlinx.coroutines.DispatchedTask.run(DispatchedTask.kt:106)
        at kotlinx.coroutines.internal.LimitedDispatcher.run(LimitedDispatcher.kt:39)
        at kotlinx.coroutines.scheduling.TaskImpl.run(Tasks.kt:95)
        at kotlinx.coroutines.scheduling.CoroutineScheduler.runSafely(CoroutineScheduler.kt:571)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.executeTask(CoroutineScheduler.kt:750)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.runWorker(CoroutineScheduler.kt:678)
        at kotlinx.coroutines.scheduling.CoroutineScheduler$Worker.run(CoroutineScheduler.kt:665)
Caused by: rx.exceptions.OnErrorThrowable$OnNextValue: OnError while emitting onNext value: okhttp3.Response.class
        at rx.exceptions.OnErrorThrowable.addValueAsLastCause(OnErrorThrowable.java:118)
        at rx.internal.operators.OnSubscribeMap$MapSubscriber.onNext(OnSubscribeMap.java:73)
        ... 30 common frames omitted

Other details

They work on normal Tachiyomi. The extension I tested with does not access any Cloudflare or DDoS-Guard backed up IPs nor websites.