When trying to enable multi-site, I'm being forced to use a sub-directory multi-site rather than the sub-domain multi-site that I need.
This is the "reason" I'm receiving:
Because your install is in a directory, the s...
To anyone else who may have this issue in the future, the solution is you need to have a domain assigned to the droplet.
You can't enable a sub-domain multisite without a domain (i.e. just the ip address).