I'm using openSUSE 42.1 with Plasma 5, and the PIM application Kontact has stopped to work: suddenly it won't start when launched, (I mean that one day it worked, the subsequent stopped to do it).
I've tried to run it from a console, this is the output:
json_parser - syntax error found, forcing abort, Line 1 Column 0 kontact(7039)/kdeui (kdelibs): No such XML file "/home/stefano/.kde4/share/apps/kontact/default-.rc"
The single applications that compose the full suite, when launched individually, start and work normally; if I launch Kmail, KAddressbook, Korganizer and so on I don't experience any problem, they are fully functional.
Despite being on Plasma5, I'm using the KDE4 version of the PIM suite and of all its programs; during the installation the system has automatically chosen this version, even if the repositories contain the other one.