App crash

[smooth-baking-powder]

Reproduce:
1.open App
2. Click on folder
3.menu Sync this folder

Except:
The folder is syncing

Server
Nextcloud 18.0.4

************ CAUSE OF ERROR ************

java.lang.RuntimeException: Unable to start service com.owncloud.android.services.OperationsService@7034c8b with Intent { act=SYNC_FOLDER cmp=com.nextcloud.client/com.owncloud.android.services.OperationsService (has extras) }: java.lang.ClassCastException: com.nextcloud.client.account.RegisteredUser cannot be cast to android.accounts.Account
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4235)
at android.app.ActivityThread.access$2200(ActivityThread.java:231)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1997)
at android.os.Handler.dispatchMessage(Handler.java:107)
at android.os.Looper.loop(Looper.java:214)
at android.app.ActivityThread.main(ActivityThread.java:7695)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:516)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:950)
Caused by: java.lang.ClassCastException: com.nextcloud.client.account.RegisteredUser cannot be cast to android.accounts.Account
at com.owncloud.android.services.OperationsService.onStartCommand(OperationsService.java:196)
at android.app.ActivityThread.handleServiceArgs(ActivityThread.java:4217)
... 8 more

************ APP INFORMATION ************
ID: com.nextcloud.client
Version: 30120051
Build flavor: gplay

************ DEVICE INFORMATION ************
Brand: OnePlus
Device: OnePlus7TPro
Model: HD1913
Id: QKQ1.190716.003
Product: OnePlus7TPro

************ FIRMWARE ************
SDK: 29
Release: 10
Incremental: 2003271900

[ezaquarii]

It looks like this is equivalent of this issue: #5857

@corincorvus Working on a fix now.

[ezaquarii]

Fix pending: #6023