Plesk update completes with warning: Some problems occurred with the System Updates tool on your server

Symptoms

• Plesk update completes with the error:

  CONFIG_TEXT: Some problems occurred with the System Updates tool on your server example.com. Please resolve them manually

• The following error is also present in Tools & Settings > System Updates:

  PLESK_WARN: Warning: Information on some packages might not be actual: inconsistencies were detected in the system's package manager database. Please resolve this issue manually.

Cause

Misconfigured OS-related package, for example, grub-pc or grub-efi:

# dpkg --audit
The following packages are only half configured, probably due to problems
configuring them the first time. The configuration should be retried using
dpkg --configure <package> or the configure menu option in dselect:
grub-efi-amd64-signed GRand Unified Bootloader, version 2 (EFI-AMD64 version,

Resolution

Contact your hosting provider/Linux administrator to solve the issue with system packages.