For shits && giggles on this, lets try
apt purge print-manager
Reboot
It's a long shot, but, more than one red hat user found this to work for them.
This was the key for me
0x00007fffc8eee768 in JobModel::updateJob(int, KCupsJob const&) () from /usr/lib/x86_64-linux-gnu/libkcupslib.so
I could also be dead wrong, if so, it can be easily reinstalled.
I don't mind being wrong, it's how we learn.