I recently did a clean OS install and had to reinstall minion. I found the 64 bit version would not find my addons no matter what I did. I installed the 32 bit version, and the problem was solved. No idea why. The OS I am using is very much 64 bit. Who knows.
EDIT: Also, if this is on a new computer or fresh install, run both the ESO launcher and the game, and then close them. That might help.