Dear Friends, I installed KDE NEON Plasma 5.8.5 on my Ubuntu 16.04.1 successfully, however, when I go to configure in / System Preferences / Appearance / Workspace Themes /, the interface freezes and I can not do But nothing since it is stuck there, there being no choice but to close System Preferences from the Main Panel. I would be grateful if you could provide me with a solution for this. I am at your service to help you, Thank you and Greetings to all.