Prerequisites: Plex

You'll need a Plex account.

Sign up for a free Plex account at https://www.plex.tv/sign-up/, if you don't already have one.

It's easiest if you have a Plex account even if you're not planning to use Plex. The default cloudbox install assumes that you are using Plex, and without a Plex account in the settings, it will fail in various ways as it tries to install Plex and then things that depends on Plex. This can be worked around^[1] , but for now the simplest route is to sign up for that free account, and then disable Plex after install if you don't want to use it.

^{1 Basically, run the core tag instead of the cloudbox tag, then run the app tags you want individually.}