I used automatic installation scripts, I used manual installation, I used different versions of armbian (latest and one year old) - the result is constant, the installation error of this particular module argon2-cffi.
I tried to install on 3.7, 3.9.9, 3.10.6 - the result is the same, an error occurred when installing the Argon module. This paukstelis installation script I also tried.
If I manually install libffi, then the OPI Zero board freezes when installing Argon2. I can wait 30-40 minutes with no result. Then armbian simply kills this process due to its inactivity.
I kind of doubt that, unless there were changes made.
Is it the same result if you remove pip cache (rm -rf ~/.cache/pip) and remove the existing OctoPrint venv (rm -rf ~/OctoPrint)?
This seems like it has to be an issue with a particular Armbian build. Quite a few people have used octoprint_install script on OrangePi's without this issue.