NPE on upload cancel in `UploadNotificationActionReceiver`

[storm1er]

⚠️ Before posting ⚠️

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

Steps to reproduce

1. Having a folder registered for auto upload
2. Set signal to use this folder as backup folder
3. Create a backup
4. Wait for nextcloud upload notification
5. Cancel it

Expected behaviour

Canceled upload. Removal of temporary file on nextcloud side

Actual behaviour

I'm getting this error and trace

Cause of error

Exception in thread "main" java.lang.RuntimeException: Unable to start receiver com.owncloud.android.files.services.FileUploader$UploadNotificationActionReceiver: java.lang.NullPointerException: Attempt to invoke virtual method 'void com.owncloud.android.files.services.FileUploader$FileUploaderBinder.cancel(java.lang.String, java.lang.String, com.owncloud.android.lib.common.operations.RemoteOperationResult$ResultCode)' on a null object reference
    at android.app.ActivityThread.handleReceiver(ActivityThread.java:5117)
    at android.app.ActivityThread.-$$Nest$mhandleReceiver(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2682)
    at android.os.Handler.dispatchMessage(Handler.java:114)
    at android.os.Looper.loopOnce(Looper.java:206)
    at android.os.Looper.loop(Looper.java:296)
    at android.app.ActivityThread.main(ActivityThread.java:9159)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:591)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1018)
Caused by: Exception in thread "main" java.lang.NullPointerException: Attempt to invoke virtual method 'void com.owncloud.android.files.services.FileUploader$FileUploaderBinder.cancel(java.lang.String, java.lang.String, com.owncloud.android.lib.common.operations.RemoteOperationResult$ResultCode)' on a null object reference
    at com.owncloud.android.files.services.FileUploader$UploadNotificationActionReceiver.onReceive(FileUploader.java:1521)
    at android.app.ActivityThread.handleReceiver(ActivityThread.java:5108)
    at android.app.ActivityThread.-$$Nest$mhandleReceiver(Unknown Source:0)
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2682)
    at android.os.Handler.dispatchMessage(Handler.java:114)
    at android.os.Looper.loopOnce(Looper.java:206)
    at android.os.Looper.loop(Looper.java:296)
    at android.app.ActivityThread.main(ActivityThread.java:9159)
    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:1018)

App information

• ID: com.nextcloud.client
• Version: 30270090
• Build flavor: gplay

Device information

• Brand: HONOR
• Device: HNFRI
• Model: FRI-NX9
• Id: HONORFRI-N39
• Product: FRI-NX9EEA

Firmware

• SDK: 33
• Release: 13
• Incremental: 7.1.0.166C430E9R3P1

Android version

13

Device brand and model

Honor magic VS

Stock or custom OS?

Stock

Nextcloud android app version

3.27.0

Nextcloud server version

27.1.5

Using a reverse proxy?

No

Android logs

No response

Server error logs

No response

Additional information

It may be due to the .backup*.temp file behind uploaded WHILE signal is doing the backup.