Cups printer installed but not recognized by application.

LibreOffice Writer fails with:

 "Could not start printer. Please check your printer configuration."

and Notepad++ reports:

"Before you can perform printer-related tasks such as page setup or printing a document, you need to install a printer. Please install one and retry."

ProblemType: Bug
DistroRelease: Ubuntu 19.04
Package: cups 2.2.10-4ubuntu2
ProcVersionSignature: Ubuntu 5.0.0-21.22-generic 5.0.15
Uname: Linux 5.0.0-21-generic x86_64
ApportVersion: 2.20.10-0ubuntu27.1
Architecture: amd64
CurrentDesktop: ubuntu:GNOME
Date: Sat Aug 3 10:27:58 2019
InstallationDate: Installed on 2019-07-30 (4 days ago)
InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
Lpstat: device for LBP6230-6240: socket://192.168.1.4
MachineType: Acer Aspire E5-522
Papersize: letter
PpdFiles: Error: command ['fgrep', '-H', '*NickName', '/etc/cups/ppd/LBP6230-6240.ppd'] failed with exit code 2: grep: /etc/cups/ppd/LBP6230-6240.ppd: Permission denied
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-5.0.0-21-generic root=UUID=72fc4deb-a416-4cf8-9607-32e97aa728e7 ro quiet splash vt.handoff=1
SourcePackage: cups
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/15/2015
dmi.bios.vendor: Insyde Corp.
dmi.bios.version: V1.08
dmi.board.asset.tag: Type2 - Board Asset Tag
dmi.board.name: Nami_CZL
dmi.board.vendor: Acer
dmi.board.version: V1.08
dmi.chassis.type: 10
dmi.chassis.vendor: Chassis Manufacturer
dmi.chassis.version: Chassis Version
dmi.modalias: dmi:bvnInsydeCorp.:bvrV1.08:bd09/15/2015:svnAcer:pnAspireE5-522:pvrV1.08:rvnAcer:rnNami_CZL:rvrV1.08:cvnChassisManufacturer:ct10:cvrChassisVersion:
dmi.product.family: CZL
dmi.product.name: Aspire E5-522
dmi.product.sku: Aspire E5-522_0960_1.08
dmi.product.version: V1.08
dmi.sys.vendor: Acer