Checking with https://nakedexperiment.com/age-verified/whats-the-problem-with-nudity/
- when I’m logged in, I can access the page
- when I’m not logged in, I get a “not authorised” page
- I created an unverified login, and with that I can display the page.
So it seems that the permission on that page is only checking that the user is logged in, and not that they are a member of the age-verified group.
Does the server host provide a control panel that would let you check the group permission of that file and the folder that it’s in?