The "Add account" button should simply show you a list of account providers on the right side of the system settings panel. Then you need to click on one of them, in order to start the account creation.
If that does not work, please provide a screenshot.
The "Add account" button should simply show you a list of account providers on the right side of the system settings panel. Then you need to click on one of them, in order to start the account creation.
If that does not work, please provide a screenshot.