I got this to work by running:
1. mv .cache .cache.old 2. kbuildsycoca5 3. plasmashell
Then I had to right click on the desktop and add the default panel.
I got this to work by running:
1. mv .cache .cache.old
2. kbuildsycoca5
3. plasmashell
Then I had to right click on the desktop and add the default panel.