Exclude login for single page

Hi, I tried following these instructions to exclude a page from enforcing login, but I’ve had no luck. I have tried it with multiple slugs and ids, only using a slug, only using an id. Still, not luck.
https://loginpress.pro/doc/exclude-the-pages-posts-from-force-login-feature-hook/

Are there any requirements for this to work? Is this only a feature of Loginpress Pro?

Thanks!