Hi, Not sure what OP is going on about, but in short: Umbrello is unable to load its own files with kf5 (version 5.57 and up), rendering the program rather useless.
Upstream bug https://bugs.kde.org/show_bug.cgi?id=406574 (NOR critical) was fixed in 2.28.1 (KDE apps 19.04.1) Please take into consideration the suggestion of the package tracker: A new upstream version 19.08.3 is available, you should consider packaging it. Thanks, Jaap
