the correct coding forum for addons does not allow new posts
Are you sure on that? All our topics are even to guests for posting. The *official* thread about Memberlist, too. So here we moved your message.
Regarding your question. First of all, I must say that the add-on works. If it doesn't work on your side, it doesn't mean it doesn't work for all. For example, it works in our demo. It is the same miniBB and add-on's version as they are provided in Downloads.
Make sure you have installed it properly. Redirection to the main page may mean that the proper $action value, i.e. `$action=members` is not caught. Make sure you have pasted the code for bb_plugins.php properly.