Nefunguje ubuntu-software

Ahojte, práve som si nainštaloval Ubuntu 20.04 a urobil som pár zmien. Pomenil som témy a nainstaloval nemo-desktop. Teraz, keď som si chcel nainštalovať pár aplikácii, tak mi nejde spustiť ubuntu-software. Skúšal som ho spustiť z terminálu pomocou príkazu

snap-store.ubuntu-software

no dostal som túto odpoveď

16:44:14:0309 Gtk Failed to load module "canberra-gtk-module"
16:44:14:0311 Gtk Failed to load module "canberra-gtk-module"
16:44:14:0345 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-blocklist, hardcoded-popular, modalias, odrs, packagekit-refine, rewrite-resource, packagekit-history, provenance, snap, systemd-updates, generic-updates, provenance-license, icons, key-colors, key-colors-metadata
16:44:14:0345 Gs  disabled plugins: dpkg, dummy, fedora-langpacks, fedora-pkgdb-collections, repos
16:44:14:0440 Gs  /etc/PackageKit/Vendor.conf file not found
16:44:14:0559 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/518/data-dir/icons/Adwaita/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/518/data-dir/icons/Adwaita/16x16/status/image-missing.png: Unrecognized image file format (gdk-pixbuf-error-quark, 3)
Zrušené (bol uložený výpis pamäte)

Neviete čo s tým? Má to podľa Vás niečo spoločné s uvedenými zmenami?

Za každú radu ďakujem.