Plesk updates fail on a Debian-based Linux server: Errors were encountered while processing: wazuh-agent

Symptoms

• On Debian-based Linux server, an attempt to update Plesk Obsidian to a newer release fails with an error that is similar to the following:

  PLESK_ERROR: Setting up wazuh-agent (4.6.0-1) ...
  dpkg: error processing package wazuh-agent (--configure):
  installed wazuh-agent package post-installation script subprocess returned error exit status 7
  Errors were encountered while processing:
  wazuh-agent
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  Launching component and product checkers...

Cause

The wazuh-agent package got corrupted. This usually happens when the Plesk update process itself gets interrupted.

Resolution

The wazuh-agent package needs to be purged and reinstalled, which can be achieved by following these steps:

1. Connect to the server via SSH

2. Remove the wazuh-agent package:

# dpkg --purge --force-all wazuh-agent

3. Rerun the Plesk update process