I want to make my project publicly accessible. But there is no permissions

The instructions say:
Making a project publicly accessible
You can open up a whole project (but not a private project) for public (anonymous) access.
You need admin permission for the project.
Go to the project and choose Settings, then Permissions. Check Enable (under 'Public Access') to allow users without a Bitbucket Server account to clone and browse any repository in the project.