Configure Experience Cloud Site Membership

Because your Experience Cloud site stores all your user information, you must add your end-user profile to the site’s membership.

Required Editions
Available in: both Salesforce Classic (not available in all orgs) and Lightning Experience
Available in: Enterprise, Unlimited, and Developer Editions

From Experience Workspaces, select Administration.

If you’re not in Experience Workspaces, here’s how you can get back to it. In the Quick Find box, enter Sites, select All Sites, and then next to your site name, select Workspaces.
From the Administration page, select Members.
Search for the Headless Demo Profile that you created earlier, and add it to Selected Profiles. You can use the Search dropdown to filter profile types.
Save your changes.