Description of problem:Kamoso application does not start


Version-Release number of selected component (if applicable):3.0~rc1-3


Steps to Reproduce:
1.Start Kamoso from Plasma5 application menu
2.nothing happens
3.start from konsole:
$ kamoso
Playing device changed "/dev/video0"
QQmlApplicationEngine failed to load component
qrc:/qml/Main.qml:188 Type ImagesView unavailable
qrc:/qml/ImagesView.qml:6 module "org.kde.purpose" is not installed

Segmentation fault (core dumped)

After installing package purpose:
$ kamoso
Playing device changed "/dev/video0"
Cannot initialize model with data QJsonObject() . missing: QJsonValue(string, "urls")
new gamma 101
file:///usr/lib/qt5/qml/QtQuick/Controls/Slider.qml:199:5: QML RangeModel: Binding loop detected for property "value"
New saturation  100
New contrast  100
Segmentation fault (core dumped)