[Bug 1788863] [NEW] Plasma Discover does not start because of missing QtQuick.Controls

[Launchpad Bug Tracker]

You have been subscribed to a public bug by Rik Mills (rikmills):

Steps to reproduce:
1. Have Ubuntu 18.04 LTS (MATE in my case)
2. Install Plasma Discover with 

    sudo apt-get install plasma-discover \
    plasma-discover-flatpak-backend plasma-discover-snap-backend

3. Try to launch Plasma Discover from GUI.

Expected results:
* Plasma Discover starts and works normally

Actual results:
* Plasma Discover does not start, when opened from terminal shows errors:

$ plasma-discover 
QQmlApplicationEngine failed to load component
qrc:/qml/DiscoverWindow.qml:3 module "QtQuick.Controls" is not installed

Errors when loading the GUI
no packages for "org.gnome.DiskUtility"
no packages for "org.mate-desktop.mate-eiciel"
no packages for "org.gnome.DejaDup"
empty appstream db
setting currentApplicationBackend PackageKitBackend(0x557c7d4a1c00)


Probably some dependencies are missed.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: plasma-discover 5.12.6-0ubuntu0.1
ProcVersionSignature: Ubuntu 4.15.0-33.36-generic 4.15.18
Uname: Linux 4.15.0-33-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CurrentDesktop: MATE
Date: Fri Aug 24 16:13:53 2018
InstallationDate: Installed on 2018-04-26 (119 days ago)
InstallationMedia: Ubuntu-MATE 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
SourcePackage: plasma-discover
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: plasma-discover (Ubuntu)
     Importance: Undecided
         Status: Fix Committed

** Affects: plasma-discover (Ubuntu Bionic)
     Importance: Undecided
         Status: Confirmed

** Affects: plasma-discover (Ubuntu Cosmic)
     Importance: Undecided
         Status: Fix Committed


** Tags: apport-bug bionic
-- 
Plasma Discover does not start because of missing QtQuick.Controls
https://bugs.launchpad.net/bugs/1788863
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