App crashes while removing account + let app remove local data

[mat-l]

⚠️ 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. Removing an Account including removing all local data

Expected behaviour

Account and local data would be deleted

Actual behaviour

Waiting for a few second, then an error occurred.

Cause of error

Exception in thread "main" java.lang.NullPointerException: Attempt to invoke interface method 'java.lang.String com.nextcloud.client.account.User.getAccountName()' on a null object reference
    at com.owncloud.android.ui.activity.FileDisplayActivity.onStart(FileDisplayActivity.kt:2810)
    at android.app.Instrumentation.callActivityOnStart(Instrumentation.java:1706)
    at android.app.Activity.performStart(Activity.java:9122)
    at android.app.ActivityThread.handleStartActivity(ActivityThread.java:4231)
    at android.app.servertransaction.TransactionExecutor.performLifecycleSequence(TransactionExecutor.java:214)
    at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:194)
    at android.app.servertransaction.TransactionExecutor.cycleToPath(TransactionExecutor.java:176)
    at android.app.servertransaction.TransactionExecutor.executeNonLifecycleItem(TransactionExecutor.java:129)
    at android.app.servertransaction.TransactionExecutor.executeTransactionItems(TransactionExecutor.java:103)
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:80)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2773)
    at android.os.Handler.dispatchMessage(Handler.java:109)
    at android.os.Looper.loopOnce(Looper.java:232)
    at android.os.Looper.loop(Looper.java:317)
    at android.app.ActivityThread.main(ActivityThread.java:8934)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:591)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:911)

App information

• ID: com.nextcloud.client
• Version: 30340190
• Build flavor: generic

Device information

• Brand: SHIFT
• Device: otter
• Model: SHIFTphone 8
• Id: SOS.7.0.20250916
• Product: otter

Firmware

• SDK: 35
• Release: 15
• Incremental: 20250916

Android version

15

Device brand and model

Shift Shiftphone 8

Stock or custom OS?

Custom (explain in "additional information")

Nextcloud android app version

3.34.1

Nextcloud server version

Nextcloud Hub 25 Autumn (32.0.3)

Using a reverse proxy?

I don't know

Android logs

No response

Server error logs

Additional information

No response