you can look for what PV is pointing you towards, by using the GUI;
by that I mean, go to your desktop;
on ours, top left, we have “pdc_home” so yours may say “signetonehome” or whatever your user name is;
we use gnome;
if we open that box, we have options to the left; (KDE must have a similar option); so ours says pdc and underneath, file system;
if you click on that, and open;
you look for the directory that says user;
open that; you are likely to see a directory called lib and one called lib64;
when you get back to us, confirm that you see the above;
then open lib; (as you should merely be logged in as a user, do not worry that you can harm or change your system; as user, you should not)
(it will take a while; a circle at the top right of the box rotates as the system finds all the contents of lib)
you should see a directory called cups;
click to open that: you should then see a directory called filter;
open that;
do you now see a file called something like pstocanonij
if you do, let us know;
then backtrack to lib64; open down to the filter directory in that; there should no be pstocanonij there; I would suspect that by copying pstocanonij from its current place to inside filter, in lib64 that you may get some action;