I have an unusual problem. After logging in, the user can see all the links on the homepage, but when they click on any of them, a message appears stating that access is only available to logged-in users – even though the user is already logged in. Interestingly, the forum works correctly – the user can access it, and they are shown as logged in there.

However, as an administrator, I do not experience this issue.

I would appreciate your help in resolving this issue.