Pext does not start on Manjaro Linux #148

[user@user-pc ~]$ pext
qt5ct: using qt5ct plugin
Using locale: en_US (system locale)
Localization loaded: True
QQmlApplicationEngine failed to load component
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:25 module "QtQuick.Extras" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:22 module "QtQuick.Controls.Styles" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:21 module "QtQuick.Controls" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:25 module "QtQuick.Extras" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:22 module "QtQuick.Controls.Styles" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:21 module "QtQuick.Controls" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:25 module "QtQuick.Extras" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:22 module "QtQuick.Controls.Styles" is not installed
file:///home/user/.local/lib/python3.7/site-packages/pext/qml/main.qml:21 module "QtQuick.Controls" is not installed

Traceback (most recent call last):
  File "/home/user/.local/bin/pext", line 10, in <module>
    sys.exit(main())
  File "/home/user/.local/lib/python3.7/site-packages/pext/__main__.py", line 3512, in main
    window = Window(locale_manager)
  File "/home/user/.local/lib/python3.7/site-packages/pext/__main__.py", line 1985, in __init__
    self.window = self.engine.rootObjects()[0]
IndexError: list index out of range