This is on a site that started with DNN 5.x and has been upgraded (through time) to DNN 7.2.1.

I noticed that new users have not been able to register on my site.

Turns out that I was using the old "Users and Accounts" "Add A User" registration form... when I need to be using the newer "Accounts Registration" module...

The problem is... I don't have that module.

I did a fresh install of 7.2.1 on another site... created an install package for Users and Roles, installed it, but I still don't have the Accounts Registration module.

Where (How) can I get the Accounts Registration Module?

PS... I do have the Accounts Login Module