Ubuntu Software doesn't launch

[stobbsm]

Trying to launch the "Ubuntu Software" application from the gnome application launcher (or any method) results in multiple apparmor errors being reported in systemd-journald and dmesg.

I expected the link to launch the application, instead I had to install gnome-software separately to have a gui installer.

Not a big problem for me, as I mainly use the terminal, but definitely not the expected behaviour when it comes to app discovery and general purpose use.

Messages pulled from dmesg:
[65915.924471] traps: snap-store[285837] trap int3 ip:7f2a6bbe7a13 sp:7ffe0e280bb0 error:0 in libglib-2.0.so.0.6200.6[7f2a6bb82000+13f000]
[65915.924579] audit: type=1400 audit(1587929541.871:1019): apparmor="DENIED" operation="open" profile="snap.snap-store.ubuntu-software" name="/var/lib/snapd/hostfs/usr/share/glib-2.0/schemas/gschemas.compiled" pid=285837 comm="snap-store" requested_mask="r" denied_mask="r" fsuid=1000 ouid=0

Also, can't report this for snap-store or ubuntu-software, so I selected gnome-software

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubuntu-software (not installed)
ProcVersionSignature: Ubuntu 5.4.0-26.30-generic 5.4.30
Uname: Linux 5.4.0-26-generic x86_64
NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
ApportVersion: 2.20.11-0ubuntu27
Architecture: amd64
CasperMD5CheckResult: skip
CurrentDesktop: ubuntu:GNOME
Date: Sun Apr 26 13:27:08 2020
InstallationDate: Installed on 2020-04-25 (0 days ago)
InstallationMedia: Ubuntu 20.04 LTS "Focal Fossa" - Release amd64 (20200423)
InstalledPlugins:
 gnome-software-plugin-flatpak N/A
 gnome-software-plugin-snap 3.36.0-0ubuntu3
SourcePackage: gnome-software
UpgradeStatus: No upgrade log present (probably fresh install)

[stobbsm (stobbsm)]

When running from the command line:
15:10:40:0040 Gtk Failed to load module "canberra-gtk-module"
15:10:40:0059 Gtk Failed to load module "canberra-gtk-module"
15:10:42:0146 Gs plugin appstream took 1.9 seconds to do setup
15:10:42:0158 Gs enabled plugins: desktop-categories, fwupd, os-release, packagekit, packagekit-local, packagekit-offline, packagekit-proxy, packagekit-refine-repos, packagekit-refresh, packagekit-upgrade, packagekit-url-to-app, appstream, desktop-menu-path, hardcoded-blacklist, hardcoded-popular, modalias, odrs, packagekit-refine, rewrite-resource, packagekit-history, provenance, snap, systemd-updates, generic-updates, provenance-license, icons, key-colors, key-colors-metadata
15:10:42:0158 Gs disabled plugins: dpkg, dummy, fedora-langpacks, fedora-pkgdb-collections, repos
15:10:43:0258 Gs /etc/PackageKit/Vendor.conf file not found
15:10:43:0558 Gtk Could not load a pixbuf from icon theme.
This may indicate that pixbuf loaders or the mime database could not be found.
**
Gtk:ERROR:../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /snap/snap-store/433/data-dir/icons/Yaru/16x16/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
Bail out! Gtk:ERROR:../gtk/gtkiconhelper.c:494:ensure_surface_for_gicon: assertion failed (error == NULL): Failed to load /snap/snap-store/433/data-dir/icons/Yaru/16x16/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
Aborted (core dumped)