Resolved Backup Fails on Plesk Obsidian for Windows — Error (0x80004005) Unspecified error

[s.buscemi]

Server operating system version

Windows server 2016 standard

Plesk version and microupdate number

18.0.67 #3

Hi everyone,

I'm struggling with a backup issue on Plesk Obsidian for Windows. I have a WordPress site that consistently fails during backup with the following error:

Unable to back up files from D:\Inetpub\vhosts\mydomain.com owned by system user.
Error: Failed to create archive: Repository error: Archiver error: unable to pack D:/Inetpub/vhosts\mydomain.com
Archive creation failed: (0x80004005) Unspecified error
See logged errors for more information.

What I've tried so far:​

1. Checked for stuck processes (RunCU.exe):
   • Verified via Task Manager — no stuck or running processes related to backups.
2. Repaired webspace permissions using repair.exe:
   D:\Plesk\bin\repair.exe --repair-webspace-security -webspace-name mydomain.com
   • Output: Permissions for the specified subscription have been repaired.
   • No change, backup still fails

• Checked Windows Event Viewer & Plesk logs:
  • Reviewed logs in:
    • Plesk\admin\logs\php_error.log
    • Plesk\admin\logs\plesklog_debug.log
    • Windows Event Viewer under Application Logs.
  • Found nothing relevant.
• Analyzed Telemetry:
  • Tried to dig deeper but couldn’t find anything useful in Plesk's telemetry data.

My questions to isolate and solve the issue:

1. Where else can I find detailed logs for Plesk's backup process?
2. Is there a way to manually trigger the archiver outside Plesk?

Any help or suggestions are greatly appreciated!

Thanks in advance,

 

[s.buscemi]

Hi everyone,

I'm struggling with a backup issue on Plesk Obsidian for Windows. I have a WordPress site that consistently fails during backup with the following error:

Unable to back up files from D:\Inetpub\vhosts\mydomain.com owned by system user.
Error: Failed to create archive: Repository error: Archiver error: unable to pack D:/Inetpub/vhosts\mydomain.com
Archive creation failed: (0x80004005) Unspecified error
See logged errors for more information.

What I've tried so far:​

1. Checked for stuck processes (RunCU.exe):
   • Verified via Task Manager — no stuck or running processes related to backups.
2. Repaired webspace permissions using repair.exe:
   D:\Plesk\bin\repair.exe --repair-webspace-security -webspace-name mydomain.com
   • Output: Permissions for the specified subscription have been repaired.
   • No change, backup still fails

• Checked Windows Event Viewer & Plesk logs:
  • Reviewed logs in:
    • Plesk\admin\logs\php_error.log
    • Plesk\admin\logs\plesklog_debug.log
    • Windows Event Viewer under Application Logs.
  • Found nothing relevant.
• Analyzed Telemetry:
  • Tried to dig deeper but couldn’t find anything useful in Plesk's telemetry data.

My questions to isolate and solve the issue:

1. Where else can I find detailed logs for Plesk's backup process?
2. Is there a way to manually trigger the archiver outside Plesk?

Any help or suggestions are greatly appreciated!

Thanks in advance,

I add also that the file D:\Plesk\Backup\domains\mydomain.com\backup_user-data_[timestamp].zip is damaged!

 

[s.buscemi]

Hello,
i think i'm solved. the website has the option WP_DEBUG enabled, and the file debug.log blocked the backup process.