Unable to install HP printer with HPLIP

[Bruce Smith]

Installation of HP Color Laserjet Pro M255dw fails whether connected via USB or network. It attempts to install but is not completing the installation. There's no way to configure any printer settings when using USB. When attempting to install over the network, no settings are being entered other than printer name and location. I would like to be able to use my expensive network printer but cannot get any help in this matter. I'm not sure what has changed, but this printer did work prior to recent CUPS updates.

hp-doctor

HP Linux Imaging and Printing System (ver. 3.21.12)
Self Diagnse Utility and Healing Utility ver. 1.0

Copyright (c) 2001-18 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.

HP Linux Imaging and Printing System (ver. 3.21.12)
Self Diagnse Utility and Healing Utility ver. 1.0

Copyright (c) 2001-18 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.

-Traceback (most recent call last):
  File "/usr/bin/hp-doctor", line 276, in <module>
    dep.core.init()
  File "/usr/share/hplip/installer/core_install.py", line 523, in init
    self.get_distro()
  File "/usr/share/hplip/installer/core_install.py", line 661, in get_distro
    if 'MX' in distro_release_name:
NameError: name 'distro_release_name' is not defined