Ubuntu Software can't install .deb files

[Vadim Peretokin]

Download the .deb from https://zoom.us/support/download and try to "Open" it - you'll get an error message saying the tool for installing software doesn't know what to do with a software installer file.

Attached is a screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-software (not installed)
ProcVersionSignature: Ubuntu 5.4.0-38.42-generic 5.4.44
Uname: Linux 5.4.0-38-generic x86_64
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.11-0ubuntu27.3
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: Unity:Unity7:ubuntu
Date: Sun Jun 14 12:38:14 2020
EcryptfsInUse: Yes
InstallationDate: Installed on 2012-03-23 (3004 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Release amd64 (20111012)
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[Sebastien Bacher (seb128)]

Thank you for your bug report, from the apport information

 Package: ubuntu-software (not installed)

do you use gnome-software or snap-store there?

[Vadim Peretokin (vperetokin)]

I imagine it is gnome-software.

[Launchpad Janitor (janitor)]

[Expired for gnome-software (Ubuntu) because there has been no activity for 60 days.]