Crash on account selection (new installation from fdroid)

[SublimeProphets]

⚠️ Before posting ⚠️

• This is a bug, not a question or an enhancement.
• I've searched for similar issues and didn't find a duplicate.
• I've written a clear and descriptive title for this issue, not just "Bug" or "Crash".
• I agree to follow Nextcloud's Code of Conduct.

Steps to reproduce

1. Installation of latest version 1.21.6. from fdroid (nextcloud app 3.23.0 already installed and configured since a long time)
2. app starts up normal
3. hit button "account selection"
4. choose an account
5. allow access to account (android notification accepted)
6. wild crash appears

Expected behaviour

Should work i guess, not sure what to expect afterwards, probably some decks ;-)

Actual behaviour

Crashes with following error response

App Version: 1.21.6
App Version Code: 1021006
Server App Version: 1.7.3
App Flavor: fdroid

Files App Version Code: 30230090

---

OS Version: 4.9.332-perf+(gms-edfd6a4e)
OS API Level: 30
Device: FP3
Manufacturer: Fairphone
Model (and Product): FP3 (FP3)

---

it.niedermann.nextcloud.deck.exceptions.TraceableException: Sorry, a wild error appeared!

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Failed to run traceable code with arguments:
{"participant":{"primaryKey":"admin","uid":"admin","displayname":"admin","type":0},"type":0,"boardId":3,"permissionEdit":null,"permissionShare":null,"permissionManage":null,"owner":false,"id":1}
Cause: JsonNull
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser.parseAcl(JsonToEntityParser.java:378)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser.lambda$parseBoard$8(JsonToEntityParser.java:327)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser$$ExternalSyntheticLambda12.run(Unknown Source:6)
	at it.niedermann.nextcloud.deck.exceptions.TraceableException.makeTraceableIfFails(TraceableException.java:13)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser.parseBoard(JsonToEntityParser.java:285)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser.parseJsonObject(JsonToEntityParser.java:51)
	at it.niedermann.nextcloud.deck.api.NextcloudArrayDeserializer.deserialize(NextcloudArrayDeserializer.java:36)
	at it.niedermann.nextcloud.deck.api.NextcloudArrayDeserializer.deserialize(NextcloudArrayDeserializer.java:18)
	at com.google.gson.internal.bind.TreeTypeAdapter.read(TreeTypeAdapter.java:76)
	at com.google.gson.Gson.fromJson(Gson.java:1214)
	at com.google.gson.Gson.fromJson(Gson.java:1124)
	at com.google.gson.Gson.fromJson(Gson.java:1094)
	at com.nextcloud.android.sso.api.NextcloudAPI.convertStreamToTargetEntity(NextcloudAPI.java:159)
	at com.nextcloud.android.sso.api.NextcloudAPI.lambda$performRequestObservableV2$1$com-nextcloud-android-sso-api-NextcloudAPI(NextcloudAPI.java:130)
	at com.nextcloud.android.sso.api.NextcloudAPI$$ExternalSyntheticLambda0.subscribe(Unknown Source:6)
	at io.reactivex.internal.operators.observable.ObservableFromPublisher.subscribeActual(ObservableFromPublisher.java:31)
	at io.reactivex.Observable.subscribe(Observable.java:12284)
	at io.reactivex.internal.operators.observable.ObservableSubscribeOn$SubscribeTask.run(ObservableSubscribeOn.java:96)
	at io.reactivex.internal.schedulers.ScheduledDirectTask.call(ScheduledDirectTask.java:38)
	at io.reactivex.internal.schedulers.ScheduledDirectTask.call(ScheduledDirectTask.java:26)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:923)
Caused by: java.lang.UnsupportedOperationException: JsonNull
	at com.google.gson.JsonElement.getAsBoolean(JsonElement.java:162)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser.lambda$parseAcl$9(JsonToEntityParser.java:386)
	at it.niedermann.nextcloud.deck.api.JsonToEntityParser$$ExternalSyntheticLambda15.run(Unknown Source:4)
	at it.niedermann.nextcloud.deck.exceptions.TraceableException.makeTraceableIfFails(TraceableException.java:13)
	... 24 more

Android version

11 (Kernel-Version 4.9.332-perf+ #1 Wed Nov 23 17:13:15 CET 2022

Device brand and model

Fairphone 3

Stock or custom OS?

Stock

Nextcloud android app version

3.23.0

Nextcloud server version

24.0.6

Using a reverse proxy?

Yes

Android logs

No response

Server error logs

No response

Additional information

Initially about 1 year ago with only one nextcloud account on my android it did NoT work as well...

[AlvaroBrey]

This looks like an issue in the Deck app, please report it there: https://github.com/stefan-niedermann/nextcloud-deck