Comment 10 for bug 1878974

Sorry for the delayed response.

In response to my own comment, I'm still seeing that log about missing "/usr/lib/cups/backend/hp"

But it actually exists (i didn't copy it)

~$ ls -al /usr/lib/cups/backend/hp
-rwxr-xr-x 1 root root 22832 Mar 31 23:51 /usr/lib/cups/backend/hp

Anyway as requested, "dpkg -l | grep hplip" output:

~$ dpkg -l | grep hplip
ii hplip 3.20.3+dfsg0-2 amd64 HP Linux Printing and Imaging System (HPLIP)
ii hplip-data 3.20.3+dfsg0-2 all HP Linux Printing and Imaging - data files
ii hplip-gui 3.20.3+dfsg0-2 all HP Linux Printing and Imaging - GUI utilities (Qt-based)