I have the same problem since a quarter years suddenly.
If I create it manuelly i became this in the log file
2025-05-18 21:15:56.312 ERROR (MainThread) [homeassistant.components.backup] Error creating backup: Backup failed: [{‘type’: ‘BackupError’, ‘message’: ‘Backup 63c6d72a error, see supervisor logs’, ‘stage’: ‘finishing_file’}]
the supervisor tells me this after manuelly backup
2025-05-18 21:15:56.293 ERROR (MainThread) [supervisor.backups.manager] Backup 63c6d72a error
Traceback (most recent call last):
File “/usr/src/supervisor/supervisor/backups/manager.py”, line 528, in _do_backup
async with backup.create():
~~~~~~~~~~~~~^^
File “/usr/local/lib/python3.13/contextlib.py”, line 221, in aexit
await anext(self.gen)
File “/usr/src/supervisor/supervisor/backups/backup.py”, line 513, in create
size_bytes = await self.sys_run_in_executor(_close_outer_tarfile)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File “/usr/local/lib/python3.13/concurrent/futures/thread.py”, line 59, in run
result = self.fn(*self.args, **self.kwargs)
File “/usr/src/supervisor/supervisor/backups/backup.py”, line 506, in _close_outer_tarfile
outer_secure_tarfile.close()
~~~~~~~~~~~~~~~~~~~~~~~~~~^^
File “/usr/local/lib/python3.13/site-packages/securetar/init.py”, line 245, in close
self._tar.close()
~~~~~~~~~~~~~~~^^
File “/usr/local/lib/python3.13/tarfile.py”, line 2031, in close
self.fileobj.close()
~~~~~~~~~~~~~~~~~~^^
OSError: [Errno 9] Bad file descriptor
after automatical this
2025-05-18 21:20:04.932 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.3.0_2025-03-06_12.46_45820715.tar: “filename ‘./backup.json’ not found”
2025-05-18 21:20:04.942 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.3.3_2025-03-18_05.56_14669071.tar: empty file
2025-05-18 21:20:04.944 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.2.4_2025-02-16_16.41_23438164.tar: empty file
2025-05-18 21:20:04.947 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.3.2_2025-03-12_14.50_26359650.tar: empty file
2025-05-18 21:20:04.947 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.4.3_2025-04-21_12.23_19344135.tar: empty file
2025-05-18 21:20:04.947 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.5.2_2025-05-18_21.14_53220743.tar: empty file
2025-05-18 21:20:04.983 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/caa11ad7.tar: “filename ‘./backup.json’ not found”
2025-05-18 21:20:04.987 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/4f7bb62a.tar: empty file
2025-05-18 21:20:04.988 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.2.5_2025-02-24_13.03_27877160.tar: empty file
2025-05-18 21:20:04.989 ERROR (MainThread) [supervisor.backups.backup] Can’t read backup tarfile /data/mounts/Fritzbox/Automatic_backup_2025.2.0_2025-02-06_08.35_44497993.tar: empty file