I have just installed Debian Stretch with KDE.
When I press ALT+F2 to invoke Krunner I would just get a little white pixel on the top of the screen /the focus will go to this pixel/.
I have tried to type konsole and press enter but it does not do anything (other that the white dot would dissapear).
If I run krunner from terminal directly I have following:
bruno@Casper:~$ krunner
"file:///usr/share/plasma/look-and-feel/org.kde.breeze.desktop/contents/runcommand/RunCommand.qml"
"Error loading QML file.\n132: Type Milou.ResultsView unavailable\n79: Type ResultDelegate unavailable\n144: Cannot assign to non-existent property \"separatorVisible\"\n"
I have checked and the file exists. Can't comment on correctness of the contents though.