Set up a forum guests are able to view but not to read. When visiting this forum as a guest your see "You do not have the required permissions to read topics within this forum." with a login form below. But when you try to log in using this form you get "General Error
Tried to redirect to potentially insecure url.".

The URL at that time is http://hammerhai/luo/ucp.php?mode=login&redirect=.%2Fviewforum.php%3Ff%3D7%26amp%3Bsid%3D86fc7ced40c5d1cf37496fa318abb976&sid=86fc7ced40c5d1cf37496fa318abb976