SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** I went to print an assignment from Okular as I normally do (and as has normally worked) when nothing happened. I tried reoponing the print option when I noticed Okular was unresponsive. Printers said it was unable to locate the printer (a printer that I've printed from countless times on this OS). I tried removing the printer and adding it back, using both driverless and hpcups, and neither time did anything happen. Kubuntu obviously detects it, because it finds it on my network, but then it can't do anything with it. Here's my system information: KDE Plasma 5.24.7 KDE Frameworks: 5.92.0 Qt: 5.15.3 Kernel: 6.2.0-35 generic (64-bit) Graphics Platform: X11 STEPS TO REPRODUCE 1. Try and print a document from Okular OBSERVED RESULT Printer is stated to be unreachable, and/or Okular freezes completely. EXPECTED RESULT The document prints SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
It looks like I can't make edits, so I'll mention this here: On a reboot, I saw a quick error saying something along the lines of "Unable to load codecs (-22)," the exact wording escapes me, but I'm sure of the negative error number in parantheses.
It sounds like there's a problem with the printing subsystem, which is below KDE. I'd recommend that you seek support from the Kubuntu folks. After all, you're using an LTS OS, so they bear the burden of providing support for integration issues for old software. Best of luck!