After you do the initial installation and initial settings, you need to set up pages for the plugin including the login page, my account and register.
how to create a Register page, go to the admin panel page> page> add new
Give your title for page and then set page attribute into 1. Elementor full width > 2. edit with Elementor,
wait for a while.
Search on Elementor Widget block " Register Form"
Drag and drop Register Form block into page,
You will find "You already logged in." That's because you are logged in as admin but if someone else or not a user who has not logged in will find a page like this: