Recently ran into this exact bug with my junk laserjet printer P1108.
From: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605589#40
The solution is here:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605589#50
Briefly:
Create the directory /var/lib/hp
Update hplip-gui
Install/update cups-pk-helper if required
Unplug, then re-plug in printer
HPLip will ask to download and install the plugin, which is a run file.
If you are behind a firewall or your internet connection is dodgy, this automatic download will fail, and you will need to manually download and install the plugin.
In a terminal run hp-plugin
Watch the terminal for URL of the plugin file.
Download *.run file from hplip website.
From: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605589#40
The solution is here:
https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=605589#50
Briefly:
Create the directory /var/lib/hp
Update hplip-gui
Install/update cups-pk-helper if required
Unplug, then re-plug in printer
HPLip will ask to download and install the plugin, which is a run file.
If you are behind a firewall or your internet connection is dodgy, this automatic download will fail, and you will need to manually download and install the plugin.
In a terminal run hp-plugin
Watch the terminal for URL of the plugin file.
Download *.run file from hplip website.