HPLaserjetPro1102w on Linux Mint 19 Tara suddenly can't print

Following are required information to support ticket:

1. Linux distribution & version
Mint 19 Tara Kernel: 4.15.0-22-generic x86_64
Desktop: Cinnamon 3.8.9 (Gtk 3.22.30-1ubuntu1)

2. HP Laserjet Professioal P1102w

3. hp-check -t
da-boss@Upstairs19Tara:~$ hp-check -t
Saving output in log file: /home/da-boss/hp-check.log

HP Linux Imaging and Printing System (ver. 3.18.7)
Dependency/Version Check Utility ver. 15.1

Copyright (c) 2001-15 HP Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

Note: hp-check can be run in three modes:
1. Compile-time check mode (-c or --compile): Use this mode before compiling the
HPLIP supplied tarball (.tar.gz or .run) to determine if the proper dependencies
are installed to successfully compile HPLIP.
2. Run-time check mode (-r or --run): Use this mode to determine if a distro
supplied package (.deb, .rpm, etc) or an already built HPLIP supplied tarball
has the proper dependencies installed to successfully run.
3. Both compile- and run-time check mode (-b or --both) (Default): This mode
will check both of the above cases (both compile- and run-time dependencies).

Check types:
a. EXTERNALDEP - External Dependencies
b. GENERALDEP - General Dependencies (required both at compile and run time)
c. COMPILEDEP - Compile time Dependencies
d. [All are run-time checks]
PYEXT SCANCONF QUEUES PERMISSION

Status Types:
    OK
    MISSING - Missing Dependency or Permission or Plug-in
    INCOMPAT - Incompatible dependency-version or Plugin-version

warning: 22-19 version is not supported. Using 22-18.3 versions dependencies to verify and install...

---------------
| SYSTEM INFO |
---------------

 Kernel: 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 GNU/Linux
 Host: Upstairs19Tara
 Proc: 4.15.0-20-generic #21-Ubuntu SMP Tue Apr 24 06:16:15 UTC 2018 GNU/Linux
 Distribution: 22 19
 Bitness: 64 bit

-----------------------
| HPLIP CONFIGURATION |
-----------------------

HPLIP-Version: HPLIP 3.18.7
HPLIP-Home: /usr/share/hplip
warning: HPLIP-Installation: Auto installation is not supported for 22 distro 19 version

Current contents of '/etc/hp/hplip.conf' file:
# hplip.conf. Generated from hplip.conf.in by configure.

[hplip]
version=3.18.7

[dirs]
home=/usr/share/hplip
run=/var/run
ppd=/usr/share/ppd/hplip/HP
ppdbase=/usr/share/ppd/hplip
doc=/usr/share/doc/hplip-3.18.7
html=/usr/share/doc/hplip-3.18.7
icon=/usr/share/applications
cupsbackend=/usr/lib/cups/backend
cupsfilter=/usr/lib/cups/filter
drv=/usr/share/cups/drv/hp
bin=/usr/bin
apparmor=/etc/apparmor.d
# Following values are determined at configure time and cannot be changed.
[configure]
network-build=yes
libusb01-build=no
pp-build=no
gui-build=yes
scanner-build=yes
fax-build=yes
dbus-build=yes
cups11-build=no
doc-build=yes
shadow-build=no
hpijs-install=no
foomatic-drv-install=no
foomatic-ppd-install=no
foomatic-rip-hplip-install=no
hpcups-install=yes
cups-drv-install=yes
cups-ppd-install=no
internal-tag=3.18.7
restricted-build=no
ui-toolkit=qt4
qt3=no
qt4=yes
qt5=no
policy-kit=no
lite-build=no
udev_sysfs_rules=no
hpcups-only-build=no
hpijs-only-build=no
apparmor_build=no
class-driver=no

Current contents of '/var/lib/hp/hplip.state' file:
[plugin]
installed = 1
eula = 1
version = 3.18.7

Current contents of '~/.hplip/hplip.conf' file:
[commands]
scan = /usr/bin/simple-scan %SANE_URI%

[fax]
email_address =
voice_phone =

[installation]
date_time = 14/09/18 18:30:28
version = 3.18.7

[last_used]
device_uri = "hp:/usb/HP_LaserJet_Professional_P1102w?serial=000000000Q91GJ7VPR1a"
printer_name = MyLaserjet
working_dir = .

[polling]
device_list =
enable = false
interval = 5

[refresh]
enable = true
rate = 30
type = 1

[settings]
systray_messages = 0
systray_visible = 0

[upgrade]
last_upgraded_time = 1533546611
notify_upgrade = true
pending_upgrade_time = 0
latest_available_version = 3.17.10

 <Package-name> <Package-Desc> <Required/Optional> <Min-Version> <Installed-Version> <Status> <Comment>

--------------
| COMPILEDEP |
--------------

 gcc gcc - GNU Project C and C++ Compiler REQUIRED - 7.3.0 OK -
 make make - GNU make utility to maintain groups of programs REQUIRED 3.0 4.1 OK -
 libtool libtool - Library building support services REQUIRED - 2.4.6 OK -

------------------------
| General Dependencies |
------------------------

 libcrypto libcrypto - OpenSSL cryptographic library REQUIRED - 1.1.0 OK -
 python-xml Python XML libraries REQUIRED - 2.2.5 OK -
 libnetsnmp-devel libnetsnmp-devel - SNMP networking library development files REQUIRED 5.0.9 5.7.3 OK -
 sane-devel SANE - Scanning library development files REQUIRED - - OK -
 pil PIL - Python Imaging Library (required for commandline scanning with hp-scan) OPTIONAL - 1.1.7 OK -
 pyqt4-dbus PyQt 4 DBus - DBus Support for PyQt4 REQUIRED 4.0 4.12.1 OK -
 libpthread libpthread - POSIX threads library REQUIRED - 2.27 OK -
 python-devel Python devel - Python development files REQUIRED 2.2 2.7.15 OK -
 cups-devel CUPS devel- Common Unix Printing System development files REQUIRED - 2.2.7 OK -
 python-dbus Python DBus - Python bindings for DBus REQUIRED 0.80.0 1.2.6 OK -
 cups-ddk CUPS DDK - CUPS driver development kit OPTIONAL - - OK -
 reportlab Reportlab - PDF library for Python OPTIONAL 2.0 3.4.0 OK -
 pyqt4 PyQt 4- Qt interface for Python (for Qt version 4.x) REQUIRED 4.0 4.12.1 OK -
 libusb libusb - USB library REQUIRED - 1.0 OK -
 cups-image CUPS image - CUPS image development files REQUIRED - 2.2.7 OK -
 python2X Python 2.2 or greater - Python programming language REQUIRED 2.2 2.7.15 OK -
 python-notify Python libnotify - Python bindings for the libnotify Desktop notifications OPTIONAL - - OK -
 libjpeg libjpeg - JPEG library REQUIRED - - OK -
 sane SANE - Scanning library REQUIRED - - OK -

----------------------
| Scan Configuration |
----------------------

 scanext Scan-SANE-Extension REQUIRED - 3.18.7 OK -
 hpaio HPLIP-SANE-Backend REQUIRED - 3.18.7 OK 'hpaio found in /etc/sane.d/dll.conf'

-------------------------
| External Dependencies |
-------------------------

 gs GhostScript - PostScript and PDF language interpreter and previewer REQUIRED 7.05 9.22 OK -
 scanimage scanimage - Shell scanning program OPTIONAL 1.0 1.0.27 OK -
 cups CUPS - Common Unix Printing System REQUIRED 1.1 2.2.7 OK 'CUPS Scheduler is running'
 network network -wget OPTIONAL - 1.19.4 OK -
 policykit PolicyKit - Administrative policy framework OPTIONAL - 0.105 OK -
 xsane xsane - Graphical scanner frontend for SANE OPTIONAL 0.9 0.999 OK -
 dbus DBus - Message bus system REQUIRED - 1.12.2 OK -
 avahi-utils avahi-utils OPTIONAL - 0.7 OK -

---------------------
| Python Extentions |
---------------------

 hpmudext IO-Extension REQUIRED - 3.18.7 OK -
 cupsext CUPS-Extension REQUIRED - 3.18.7 OK -

------------------------------
| DISCOVERED SCANNER DEVICES |
------------------------------

No Scanner found.

--------------------------
| DISCOVERED USB DEVICES |
--------------------------

  Device URI Model
  -------------------------------- -------------------------------
  hp:/usb/HP_LaserJet_Professional HP LaserJet Professional P1102w
  _P1102w?serial=000000000Q91GJ7VP
  R1a

---------------------------------
| INSTALLED CUPS PRINTER QUEUES |
---------------------------------

MyLaserjet
----------
Type: Printer
Device URI: hp:/usb/HP_LaserJet_Professional_P1102w?serial=000000000Q91GJ7VPR1a
PPD: /etc/cups/ppd/MyLaserjet.ppd
PPD Description: HP LaserJet Professional p1102w, hpcups 3.18.7, requires proprietary plugin
Printer status: printer MyLaserjet is idle. enabled since Fri 14 Sep 2018 18:13:10 ACSTRendering completed
Required plug-in status: Installed
Communication status: Good

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

USB MyLaserjet Required - - OK Node:'/dev/bus/usb/001/003' Perm:' root lp rw- rw- rw- rw- r--'
No errors or warnings.

Done.
da-boss@Upstairs19Tara:~$
 ===================

Printer has been printing without any problems until 12 September it suddenly stopped working on 13 September.
I have tried adding printer in hope that it would solve the problem but to no avail.
I now cannot delete the added printers because using my user/password (which is the only one for sudo as well)
When trying to delete printers added via the toolbox via localhost 631, it says "authentication failed" despite there is only one password as I'm the user and administrator.

The printer is discovered and shown on the HPLIP Toolbox as 'Idle', but test page or any documents sent to it do not print at all. Cannot see a 'check' although printer is showing as Default Printer. Error message indicates that there was an error processing document.

The printer used to work with a standalone windows PC but has dropped out of detection and therefore cannot print either.

Your advice as to how to fix this problem without having to re-install Mint 19 would be most appreciated.