For some reason Discover doesn't start on Kubuntu for me. This has started happening starting a few weeks ago. I can run apt-get commands just fine from the console with no warnings or errors. There is no output on the console if I run the command plasma-discover --mode update in Konsole.
Also if I launch plasma-discover --mode update under another account, say root using sudo, it starts up properly.
How can I debug this further? I suspect some config file is corrupted but I cannot figure out which one.