Can't install app due to hideous error
I'm getting the following error message/log while trying to install Fedora Image Writer from the fedora repos:
12:23:17:0513 As run 0x7fb3ec0624f0~GsPlugin::*(gs_plugin_app_install)
12:23:17:0514 As run 0x7fb3ec0624f0~GsPlugin::fwupd(gs_plugin_app_install)
12:23:17:0514 As run 0x7fb3ec0624f0~GsPlugin::shell-extensions(gs_plugin_app_install)
12:23:17:0514 As run 0x7fb3ec0624f0~GsPlugin::packagekit(gs_plugin_app_install)
12:23:17:0514 PK adding state 0x7fb3c84b7ef0
12:23:17:0514 PK role now install-packages
12:23:17:0558 As run 0x7fb3ec0624f0~packagekit-refine::transaction
12:23:17:0693 PK remove state 0x7fb3c84b7ef0
12:23:17:0693 Gs recovering state on mediawriter.desktop from installing to available
12:23:17:0693 Gs failed to call gs_plugin_app_install on packagekit: could not do untrusted question as no klass support
12:23:17:0693 As run 0x7fb3ec0624f0~GsPlugin::steam(gs_plugin_app_install)
12:23:17:0693 As run 0x7fb3ec0624f0~GsPlugin::flatpak(gs_plugin_app_install)
12:23:17:0693 As run 0x7fb3ec0624f0~GsPlugin::epiphany(gs_plugin_app_install)
12:23:17:0693 As run 0x7fb3ec0624f0~appstream::refine-from-id{system/package/fedora/desktop/mediawriter.desktop/*}
12:23:17:0693 Gs searching appstream for system/package/fedora/desktop/mediawriter.desktop/*
12:23:17:0693 As run 0x7fb3ec0624f0~appstream::refine-app{system/package/fedora/desktop/mediawriter.desktop/*}
12:23:17:0693 As run 0x7fb3ec0624f0~appstream::refine-addons{system/package/fedora/desktop/mediawriter.desktop/*}
12:23:17:0694 As run 0x7fb3ec0624f0~GsPlugin::packagekit-refine(gs_plugin_app_install;gs_plugin_refine)
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine[name->id]
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine[installed-filename->id]
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine[id->update-details]
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine[source->license]
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine[update-urgency]
12:23:17:0694 As run 0x7fb3ec0624f0~GsPlugin::generic-updates(gs_plugin_app_install;gs_plugin_refine)
12:23:17:0694 As run 0x7fb3ec0624f0~GsPlugin::packagekit-history(gs_plugin_app_install;gs_plugin_refine)
12:23:17:0694 As run 0x7fb3ec0624f0~GsPlugin::packagekit-refine-repos(gs_plugin_app_install;gs_plugin_refine)
12:23:17:0694 As run 0x7fb3ec0624f0~packagekit-refine-repos[repo-filename->id]
12:23:17:0694 Gs found new mediawriter.desktop:mediawriter:4.1.1-2.fc28
12:23:17:0694 Gs running install with refine-flags=require-setup-action,require-origin with failure-flags=use-events,fatal-auth with timeout=60 on plugin=epiphany on apps system/package/fedora/desktop/mediawriter.desktop/* took 180ms
12:23:17:0712 Gs emitting waiting(mediawriter.desktop)
12:23:17:0712 Gs emitting waiting(mediawriter.desktop)
12:23:17:0712 Gs emitting waiting(mediawriter.desktop)
12:23:17:0713 Gs emitting querying(mediawriter.desktop)
12:23:22:0514 Gs plugin no longer recently active: fwupd
12:23:22:0694 Gs plugin no longer recently active: packagekit
12:23:22:0694 Gs plugin no longer recently active: shell-extensions
12:23:22:0694 Gs plugin no longer recently active: appstream
12:23:22:0694 Gs plugin no longer recently active: fedora-pkgdb-collections
12:23:22:0694 Gs plugin no longer recently active: desktop-menu-path
12:23:22:0694 Gs plugin no longer recently active: steam
12:23:22:0694 Gs plugin no longer recently active: modalias
12:23:22:0694 Gs plugin no longer recently active: flatpak
12:23:22:0694 Gs plugin no longer recently active: hardcoded-blacklist
12:23:22:0694 Gs plugin no longer recently active: hardcoded-featured
12:23:22:0694 Gs plugin no longer recently active: packagekit-refine
12:23:22:0694 Gs plugin no longer recently active: rewrite-resource
12:23:22:0694 Gs plugin no longer recently active: epiphany
12:23:22:0694 Gs plugin no longer recently active: generic-updates
12:23:22:0694 Gs plugin no longer recently active: repos
12:23:22:0694 Gs plugin no longer recently active: provenance
12:23:22:0694 Gs plugin no longer recently active: packagekit-history
12:23:22:0694 Gs plugin no longer recently active: icons
12:23:22:0694 Gs plugin no longer recently active: odrs
12:23:22:0694 Gs plugin no longer recently active: key-colors
12:23:22:0694 Gs plugin no longer recently active: provenance-license
12:23:22:0694 Gs plugin no longer recently active: packagekit-refine-repos
12:23:22:0694 Gs plugin no longer recently active: key-colors-metadata