package grub-pc 2.04-1ubuntu26.13 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 126

[filippo]

The system indicates this bug, I don't know what it means.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: grub-pc 2.04-1ubuntu26.13
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sun Aug 29 16:34:47 2021
ErrorMessage: installed grub-pc package post-installation script subprocess returned error exit status 126
InstallationDate: Installed on 2020-10-06 (327 days ago)
InstallationMedia: Ubuntu 20.04.1 LTS "Focal Fossa" - Release amd64 (20200731)
ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.11.0-27-generic root=UUID=bb368bbc-13be-4037-b7d6-02d2e1f3d927 ro intel_idle.max_cstate=1 quiet splash vt.handoff=7
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: N/A
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.6
SourcePackage: grub2
Title: package grub-pc 2.04-1ubuntu26.13 failed to install/upgrade: installed grub-pc package post-installation script subprocess returned error exit status 126
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.