Patient Portal Not Allowing Self Registering

I am following the instructions for enabling the Patient Portal and my intention is to let new patients self register so they can make an online booking. I already have the “Allow New Patient Registration Widget” checkbox checked in my Admin - Globals - Portal but when I access the Patient Portal it does not show a register button, it only allows logging in using a pre set username and password. Why can’t I self register as a patient?

have to setup google’s recaptcha