Thanks, Brian! Yeah, I ended up using the hplip packages from 18 LTS.
Since HP requires their proprietary plugin and didn't have plugin version 3.17.10 available for download (matching 3.17.10 which ships with 18 LTS) but had 3.17.11 as the oldest version, I downloaded and renamed 3.17.11 plugin to 3.17.10 and then HP's "hp-plugin" installer was able to find it. I can print now.
Thanks, Brian! Yeah, I ended up using the hplip packages from 18 LTS.
Since HP requires their proprietary plugin and didn't have plugin version 3.17.10 available for download (matching 3.17.10 which ships with 18 LTS) but had 3.17.11 as the oldest version, I downloaded and renamed 3.17.11 plugin to 3.17.10 and then HP's "hp-plugin" installer was able to find it. I can print now.