To enable user registration on your page, please first enable it in your WordPress: Settings → General → Membership – and check the “Anyone can register” option.
Once you have enabled registration on your website create a static page with this shortcode:
Then go to Realteo Options → Pages select that page as “My Account Page” option.
If you are using WooCommerce, you can also set that page page as your “My account page” in WooCommerce → Settings → Accounts.
If you would like to display Log In / Register and User Menu in header go to Customize → Header → General Header