https://bugs.freedesktop.org/show_bug.cgi?id=83422
--- Comment #17 from simon simonlang1984@gmail.com --- @Michel Dänzer
you won't believe it i just loged in kde plasma next again and the applet is now working again. dunno what the problem really is.
i will leave it till tomorrow, do again a kde update and will have a look at it again.