[2.1] Unable to go through first time setup on KDE

[nils-van-zuijlen]

Application version
2.1
Also seen compiling from master (9afbc64)

Platform
Linux, Archlinux, KDE Plasma 5.20.3
Installed from community or aur

Printer
None...

Reproduction steps

1. Launch Cura for the first time (without any configuration)
2. That's it!

Screenshot(s)

Actual results
Cura starts and prompts to start the setup, but no button is visible nor clickable (I tried clicking almost anywhere on screen without any change)

Expected results
A button to continue setup should be visible

Log file
cura.log

Most relevant part (I think):

2020-11-11 10:10:36,300 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/lib/qt/qml/QtQuick/Controls.2/org.kde.desktop/TabBar.qml:30: TypeError: Cannot read property 'height' of null
2020-11-11 10:10:36,303 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/share/cura/resources/qml/Menus/ConfigurationMenu/CustomConfiguration.qml:233: TypeError: Cannot read property 'isEnabled' of null
2020-11-11 10:10:36,308 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/share/cura/resources/qml/Cura.qml:410: TypeError: Cannot read property 'Component' of null
2020-11-11 10:10:36,331 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/lib/qt/qml/QtQuick/Controls.2/org.kde.desktop/TabBar.qml:30: TypeError: Cannot read property 'height' of null
2020-11-11 10:10:36,333 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/share/cura/resources/qml/PrintSetupSelector/Custom/MenuButton.qml:42:18: QML Label: Cannot anchor to an item that isn't a parent or sibling.
2020-11-11 10:10:36,336 - WARNING - [MainThread] UM.Qt.QtApplication.__onQmlWarning [408]: file:///usr/lib/qt/qml/QtQuick/Controls.2/org.kde.desktop/ComboBox.qml:96:9: QML Connections: Implicitly defined onFoo properties in Connections are deprecated. Use this syntax instead: function onFoo(<arguments>) { ... }

Additional information
From the logs, it seems to be caused by a name clash between Cura and KDE Qml definitions.

Also when closing, Cura segfaults.

[fieldOfView]

If this is Cura 2.1, then I am Micky Mouse ;-). Cura 2.1 was released in 2016.

Only the AppImage as distributed by Ultimaker is official supported here. It comes with the dependencies that it is known to work with.

[jellespijker]

Duplicate of #8472

This because you probably have a newer Qt5 version installed system-wide then Cura supports (5.10). That is because the AUR builds it from source. I personally use Manjaro and the AUR package and I came across the same issue. Unfortunately we only support the AppImage.

Please raise this issue with the maintainer of the AUR repository https://aur.archlinux.org/packages/cura-git/