Member Templates

Greetings from Hawaii,

I’m difficulty setting up the member templates in EE5. I can see the templates in the folders that I created (system/user/templates/_themes/member/custom_theme_name/ and themes/user/member/custom_theme_name/), but when I go the template manager, it tells me “No templates found. See documentation.” I’m hunted high and low in the docs but can’t seem to figure out what the problem is. :( I attached a screenshot. What am I doing wrong?

Thanks in advance!