This happened after a pristine install of the latest version (KDE) after the first reboot when adding widgets to the screen.
I used the Grouping Plasmoid added a few widgets to it then clicked on the plasmoid to get the right side controls showing
then clicked cancel button . This sequence caused the screen to crash. It resurrected again but now the Create New item of the
right click menu is not showing anymore. Also the previously showing Home and Trash icons have disappeared, the relevant links
in the desktop folder are here , but are ignored even after a reboot.
The question is how to get the Create New line back into the menu ?