Application does not open under Arch Linux

➜  ~ onvifviewer 
Warning: Ignoring XDG_SESSION_TYPE=wayland on Gnome. Use QT_QPA_PLATFORM=wayland to run on Wayland anyway.
QQmlApplicationEngine failed to load component
qrc:/main.qml:40:9: Type DeviceViewerPage unavailable
qrc:/DeviceViewerPage.qml:234:9: Type OnvifCameraViewer unavailable
qrc:/OnvifCameraViewer.qml:17:1: module "QtMultimedia" is not installed

I installed the aur version. But I didn't succeed. The application does not open.

Does anyone have any suggestions on how I can fix this error?