Optional 2:
If you want to have the "needed dependencies" (libraries) automatically enabled for your addons, as you enable the addon, you might install
Votans Addon List
Attention: it will NOT download the dependencies! It will just enable them in the ingame addon manager (if youa re ingame already, not possible to do so at the character seleciton screen as ALL addons are forbidden to work there!) Sharlikran has shown you above with the screenshots.
You still need to instal lthe libraries as standalone version e.g. (like an addon, via Minion) once to be able to enable them ingame.
AND ALWAYS MAKE SURE TO LOGOUT BEFORE INSTALLING/UPDATING ADDONS/LIBRARIES, please!
There mustn't be any problem if you are logged in but there have been several already. In order to minimize the risk just log out before updating any addon or library -> e.g. do not use Minion's auto update in the background if you are playing. Might work for 75% cases but will break 25% (as example) and it's hard to find the problem then.