Issue Broken update after switching from Obsidian 18.0.72 to 18.0.73

[Petrs]

Server operating system version

Debian 13

Plesk version and microupdate number

Plesk Obsidian v18.0.73_build1800250927.14 os_Debian 13.0

Yesterday I upgraded Plesk 18.0.72 to Plesk 18.0.73, everything is functional, but if you try to run an update or fetch updates in the section, a notification appears:

Error: Unable to get list of packages:

2025-10-02 14:13:13 INFO: pum is called with arguments: ['--list', '--repo-info', '--json']
2025-10-02 14:13:14 ERROR: '13'
2025-10-02 14:13:14 ERROR: Exited with returncode 1


When I attempt to run the automatic Plesk repair, after about 2 minutes it freezes on repairing the Plesk database, consumes all of my 30 GB RAM, and the server crashes. After a reboot, the server comes back online, but the Plesk repair does not complete. I tested reinstalling Plesk, but it didn’t help.

Has anyone experienced this issue?

Please share any fix. Thank you.

 

[scsa20]

If you are using Debian 13, you might run into random issues since Debian 13 isn't technically fully supported (yet). Support for a lot of packages is being added after each update so it's getting there.

With that said, can you check what shows up in your /var/log/plesk/install/autoinstaller3.log log? It's possible that there's a duplicate entry of a repo or a discontinued repo that's triggering it and that autoinstaller3.log file should give us some insights.

 

[scsa20]

You can also refer to https://support.plesk.com/hc/en-us/...ng-System-Updates-Unable-to-get-packages-list which tells you what to look for and the fix.