Comment 1 for bug 1878974

It looks several others have been having problems with hplip in 20.04

Answer 690278 is similar.
As I already noted Answer 690720 is also similar.

I have attempted to purge all references to hplip and re-install the packages included in 20.04 (which install 3.20.3) but that does not seem to change the results shown above.

I'm noticing in the logs error reports
"
Printer Backend /usr/lib/cups/backend/hp does not exist!15 May 2020 10:52:34 AM PDT -
"

For my specific issue will see if I can obtain these files from another system I have as it looks like many people use the hp installer to repair/replace these missing files (but as noted above the HP installer even version 3.20.5) is not currently passing checks in Ubuntu 20.04