Comment 5 for bug 1805576

This looks like something is messed up on your system, as dpkg tells that you have hplip-data installed ans also the file /usr/share/python3/runtime.d/hplip-data.rtupdate is present, but the directory /usr/share/hplip/ui5/ and its files, which are also part of this package, are missing.

Please re-install the package via

sudo apt install --reinstall hplip-data

to recover the lost files. Please tell whether this eliminates the problems you have reported here.