package chromium-browser (not installed) failed to install/upgrade: new chromium-browser package pre-installation script subprocess returned error exit status 1

[Wafo Wembe Emmanuel junior]

I think the source of bug is SnapD.

ProblemType: Package
DistroRelease: Ubuntu 20.04
Package: chromium-browser (not installed)
ProcVersionSignature: Ubuntu 5.8.0-59.66~20.04.1-generic 5.8.18
Uname: Linux 5.8.0-59-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
AptOrdering:
 snapd:amd64: Install
 snapd:amd64: Configure
 chromium-browser:amd64: Install
 NULL: ConfigurePending
Architecture: amd64
CasperMD5CheckResult: skip
Date: Sat Jul 3 06:48:05 2021
ErrorMessage: new chromium-browser package pre-installation script subprocess returned error exit status 1
InstallationDate: Installed on 2021-06-09 (28 days ago)
InstallationMedia: Ubuntu 20.04.2.0 LTS "Focal Fossa" - Release amd64 (20210209.1)
Python3Details: /usr/bin/python3.8, Python 3.8.10, python3-minimal, 3.8.2-0ubuntu2
PythonDetails: /usr/bin/python2.7, Python 2.7.18, python-is-python2, 2.7.17-4
RelatedPackageVersions:
 dpkg 1.19.7ubuntu3
 apt 2.0.5
SourcePackage: chromium-browser
Title: package chromium-browser (not installed) failed to install/upgrade: new chromium-browser package pre-installation script subprocess returned error exit status 1
UpgradeStatus: No upgrade log present (probably fresh install)

[Olivier Tilloy (osomon)]

From DpkgTerminalLog.txt:

==> Installing the chromium snap
erreur : system does not fully support snapd: cannot mount squashfs image
          using "squashfs": mount: /tmp/sanity-mountpoint-544566046: wrong fs
          type, bad option, bad superblock on /dev/loop0, missing codepage or
          helper program, or other error.