Comment 2 for bug 1879206

These problems are highlighted with hplip-gui diagnostics:

DeskJet-3630
------------
Type: Printer
Device URI: hp:/usb/DeskJet_3630_series?serial=CN8AM7H3230658
PPD: /etc/cups/ppd/DeskJet-3630.ppd
warning: Failed to read /etc/cups/ppd/DeskJet-3630.ppd ppd file
PPD Description:
Printer status: la stampante DeskJet-3630 è inattiva. è stata abilitata da lun 18 mag 2020, 02:12:27
error: Unable to communicate with device (code=12): hp:/usb/DeskJet_3630_series?serial=CN8AM7H3230658
error: Device not found
error: Communication status: Failed

--------------
| PERMISSION |
--------------

Checking Permissions....

Checking for Configured Queues....
warning: Fail to read ppd=/etc/cups/ppd/DeskJet-3630.ppd file
warning: Insufficient permission to access file /etc/cups/ppd/DeskJet-3630.ppd
warning: Could not complete Queue(s) configuration check

Checking for HP Properitery Plugin's....
No plug-in printers are configured.

Checking for Printer Status....
error: 'DeskJet-3630' Printer is either Powered-OFF or Failed to communicate.
Turn On Printer and re-run hp-doctor

Diagnose completed...