Nextcloud AIO BorgBackup: extended stat (xattrs): [Errno 13] Permission denied: '<FD 7>'

Nextcloud version: 17.0.1
Operating system and version: Debian 12
Nextcloud AIO version: 6.3.0


I have freshly installed Nextcloud AIO. My data directory is on a mounted CIFS folder. The backup should also take place in a mounted CIFS folder.
After the installation, I directly performed a backup. The following error occurred:

Performing backup...
Starting the backup...
Creating archive at "/mnt/borgbackup/borg::20230724_091348-nextcloud-aio"
/nextcloud_aio_volumes/nextcloud_aio_nextcloud_data: extended stat (xattrs): [Errno 13] Permission denied: '<FD 7>'
Repository: /mnt/borgbackup/borg
Archive name: 20230724_091348-nextcloud-aio
Archive fingerprint: 1cc42bc2675914829472adf1557ac9191d2720343993df67a94e61f2a82cbb16
Time (start): Mon, 2023-07-24 09:13:51
Time (end):   Mon, 2023-07-24 09:15:28
Duration: 1 minutes 37.10 seconds
Backup failed!
You might want to check the backup integrity via the AIO interface.

Then I immediately reinstalled Nextcloud AIO and tried another backup. This was done without any problems and the backup was created.

About 24 h later I tried to backup again and the same error occurred.

What permissions are BorgBackup missing and how can I fix it?.

I hope someone can help me.