F34 current 

Looks like plasma-5.22.3-1 (plasma-desktop-5.22.3-1.fc34.x86_64)

Issue:   When looking to add items to the taskbar (similar to Cinnamon) I select the application that I want to add and right click.... Immediately plasmashell goes away.   It does restart.  Frustrating in that there has to be a way to move apps to the panels to have access to them without pinning but either I am missing it or doing something wrong.

From a terminal did the following:

killall plasmashell

plasmashell&  

 

Take the above action and get this in the shell:

trying to show an empty dialog
file:///usr/share/plasma/plasmoids/org.kde.plasma.kickoff/contents/ui/LeaveButtons.qml:69:5: QML ToolBu
tton: Binding loop detected for property "display"
QFont::setPointSizeF: Point size <= 0 (0.000000), must be greater than 0
file:///usr/share/plasma/plasmoids/org.kde.plasma.printmanager/contents/ui/PopupDialog.qml:91:17: Unabl
e to assign [undefined] to QString
 
file:///usr/lib64/qt5/qml/org/kde/plasma/components/ModelContextMenu.qml:
38:1: QML ModelContextMenu: Accessible must be attached to an Item
trying to show an empty dialog
KCrash: Attempting to start /usr/bin/plasmashell
KCrash: Application 'plasmashell' crashing...
KCrash: Attempting to start /usr/libexec/drkonqi