Sadly, many addon authors are updating/changing their addons, and incorporating the need for new libraries, without mentioning the new libraries in their changelogs, or even anywhere on their websites.
It would be super fantastic, if Minion could detect addon dependencies, and find them for you!
It's on the list of Minion 4 but don't ever expect it for Minion 3.
You are able to see the dependencies ingame in the addon manager properly, by expanding the addon.
And to be honest tell the addon devs to add it to the description of the addon if you find missing ones. Add a comment or write a pm. They might be thankful for the oversight fix