I haven't been able to find a replacement for the following command, removed some time ago (Kwin 5.9 maybe?): qdbus org.kde.plasma-desktop /MainApplication showInteractiveKWinConsole It is still wrongly documented at https://techbase.kde.org/Development/Tutorials/KWin/Scripting "Alt+F2 wm console" does not work for my usecase (launch at boot).
With the Plasma 5: 'qdbus org.kde.plasmashell /PlasmaShell org.kde.PlasmaShell.showInteractiveConsole '
As Rog131 said. Your link is a wiki, so feel free to update it to the Plasma 5 version
Wiki updated. Thanks.