Also, what version of Electrum are you running?
Thanks, working perfectly now. Somehow I was missing Cython from my command line. I used the command lines in your link and everything built fine.
Unfortunately not, since this package has to be installed using pip (since python3 is required: pip3), and not your local package manager.
But this command will update all outdated pip packages:
If you are running a server and need electrum to always work flawlessely you might consider adding this command to your cron file (which tells the server to execute a given script at a given time/interval).
I was running python updated already, but I didn't realize it couldn't be automated via a debian source list approach. I get it now.
Thanks to both of you members!!