Alternative = manually installation of addons:
https://www.esoui.com/forums/faq.php..._howto_install
Did you check the Minion troubleshoot thread in the Minion forums already and made sure ALL steps were tried?
https://www.esoui.com/forums/showthread.php?t=8082
Did you try to deinstall and install Minion 32bit (not 64!) at another folder like c:\Minion instead of the c:\users\...\AppData (hidden folder)?
Also change the scan depth in the minion settings (top right corner -> gear icon) and after it scans for the addons wait like 2 mins and then close Minion, and restart it afterwards. Do the addons show up then?
if not:
Post your Minion.log file here so I can have a look what might be the issue. Most of the times it's either your network/firewall or Antivirus blocking it.
Or it's the java version.