Registration Emails Not Triggering

Hello! I was able to get PayPal payments set up just fine, and the automated email with registration details… but it’s sending new members to a blank page. I’m using BuddyPress and I thought it was automatically created, but I guess not. So I tried adding a BP short code [bbp-register] but that didn’t seem to do the trick, either. The shortcode just shows up on the published page without bringing in a form of any kind. Any advice?