File-Based Backup failed with Internal Error due to multi-byte language in the destination for the backup

Products

• VMware vCenter Server 7.0
• VMware vCenter Server 8.0

Issue/Introduction

• File-Based Backup failed with Internal Error.  Both scheduled backup and manual backup failed.
  
  
• The following error message is found on the vCenter:
  
  /var/log/vmware/applmgmt/backupScheduler.log:
  
  2025-02-06T01:00:07.406 [0] [MainProcess:PID-38297] [Scheduler::ExecScheduleRun:Scheduler.py:138] ERROR: Failed to issue the Schedules.run request. Exception: {messages : [LocalizableMessage(id='com.vmware.appliance.unknown-twisted-error', default_message='Internal error. See logs for details. https://hostname.example.com/appliance/support-bundle', args=['hostname.example.com'], params=None, localized=None)], data : None, error_type : None}
　Traceback (most recent call last):
　  File "/usr/lib/applmgmt/backup_restore/py/vmware/appliance/backup_restore/Scheduler.py", line 133, in ExecScheduleRun
　    status = svc_handle.run(scheduleId, comment='SCHEDULED')
　  File "/usr/lib/applmgmt/pyclient/applmgmt_client-1.0-py2.7.egg/com/vmware/appliance/recovery/backup_client.py", line 1171, in run
　    'comment': comment,
　  File "/usr/lib/applmgmt/vapi/lib/vapi_runtime-2.100.0-py2.py3-none-any.whl/vmware/vapi/bindings/stub.py", line 345, in _invoke
　    return self._api_interface.native_invoke(ctx, _method_name, kwargs)
　  File "/usr/lib/applmgmt/vapi/lib/vapi_runtime-2.100.0-py2.py3-none-any.whl/vmware/vapi/bindings/stub.py", line 298, in native_invoke
　　    self._rest_converter_mode)
　　com.vmware.vapi.std.errors_client.Error: {messages : [LocalizableMessage(id='com.vmware.appliance.unknown-twisted-error', default_message='Internal error. See logs for details. https://hostname.example.com/appliance/support-bundle', args=['hostname.example.com'], params=None, localized=None)], data : None, error_type : None}

Cause

There is a file or folder that the file or folder name includes multi-byte language (example: Japanese) in the backup destination location on the ftp or sftp server.

Resolution

Delete the file or folder that the name includes the multi-byte Language. Once this is completed the file based backups will succeed.