KDE User Base serves as the landing page for the Device Notifier plasmoid. The page is currently down. Reproducible: Always Steps to Reproduce: 1. Tell Firefox to visit the URL. Actual Results: 1. 91.189.93.5: Connection timed out Expected Results: 1. KDE Device Notifier description
This is a known issue, the entire server is down, that involves the wikis, forum, dot. Should be fixed soon hopefully.
And this is explained on Planet KDE. By the way, the KDE sysadmins team needs more people so if you feel like helping you will be welcome!
Userbase is back online.