My earlier HP printer also worked through HPLIP but never had this python problem.Amigo wrote: Tue Dec 22, 2020 11:27 am Looking info about the hplip error. i found that it's seems to be related to phython
https://bugs.launchpad.net/hplip/+bug/1813768
"It appears that HPLIP needs Python 3, but Ubuntu defaults to the deprecated Python 2" <------ NOTE: Ubuntu
https://answers.launchpad.net/hplip/+question/691141
In the post# 7 someone is posting a solution (update "the symbolic link" of python inside /usr/bin/) <------ NOTE: Ubuntu
Maybe you can try it in lubuntu and see if that fixes it (if that work in lubuntu then i guess is easier to apply the equivalent method in MX linux).
Will check that thread but it gets frustrating as I can not even return this printer and buy a different one.