"Unable to find [Invalid UTF-8]" after installing a downloaded deb package

I downloaded a deb package (in this case Skype, but it's happened with other downloaded debs) and the package installed correctly. However, upon completion, the gnome-software window displayed

Unable to find "[Invalid UTF-8]"

I can close the window and everything is fine. It's just weird that it displays this message.

I've attached a screenshot.

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: gnome-software 3.30.6-2ubuntu4.19.04.2
ProcVersionSignature: Ubuntu 5.0.0-38.41-generic 5.0.21
Uname: Linux 5.0.0-38-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.3
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Mar 28 17:43:32 2020
ExecutablePath: /usr/bin/gnome-software
InstallationDate: Installed on 2019-06-02 (300 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-snap 3.30.6-2ubuntu4.19.04.2
ProcEnviron:
 XDG_RUNTIME_DIR=<set>
 SHELL=/bin/bash
 PATH=(custom, user)
 LANG=en_US.UTF-8
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)