Quote:
Originally Posted by theducks
Read the last line.
3.21 does not meet the PI requirements.
I suspect your distro is typical and WAY BEHIND.
Use the command found on the Calibre Linux Download page and join us with a modern 5.x version. 
Your other option, is to uninstall the PI and find someone with an old version of it |
Never ever use a Linux repository. It is a waste of time and you could find things break.