I just followed these directions:
to install KDE plasma. I didn’t bother with the PIM Stack or anything below it.
On rebooting and logging in I get an utterly blank desktop. I can switch to other desktops, and I can get into setup and the file manager, but there’s NO evident way to open any other aps at all. (There’s nothing at all on the lower left, if that’s where it’s supposed to be.)
I couldn’t even get konsole to open from the file manager (it doesn’t appear to be regarded as a program at all).
So I think something went wrong, but how do I fix it when I can’t get to a command line?