Issue Problem updating to the new version of Plesk

[karyo]

Hello
The following error occurs when updating to the new version in Plesk Installer

Configuration file '/usr/share/psa-roundcube/config/config.inc.php'
==> Modified (by you or by a script) since installation.
==> Package distributor has shipped an updated version.
==> Keeping old config file as default.
Processing triggers for systemd (237-3ubuntu10.45) ...
Processing triggers for man-db (2.8.3-2ubuntu0.1) ...
Processing triggers for rsyslog (8.32.0-1ubuntu4) ...
Processing triggers for ureadahead (0.100.0-21) ...
Processing triggers for libc-bin (2.27-3ubuntu1.4) ...
Errors were encountered while processing:
amavisd-new
E: Sub-process /usr/bin/dpkg returned an error code (1)
Launching component and product checkers...
Downloading file report-update: 0%
Downloading file report-update: 100% was finished.
Downloading file pool/PSA_18.0.34_5691/examiners/py_launcher.sh: 0%
Downloading file pool/PSA_18.0.34_5691/examiners/py_launcher.sh: 100% was finished.
Error: An error occurred on attempt to install packages.
Attention! Your software might be inoperable.
Visit https://support.plesk.com/ to search for a solution.

Where does the problem come from and how is it solved?

 

[IgorG]

The issue is caused by corrupted amavis installation, that prevented the package from being installed/updated properly.
To resolve the issue try to remove amavis completely with:

# dpkg --purge amavisd-new

and then repeat the upgrade procedure.