@Mike I've got the exact same issue as the OP here. I removed the /forums extension for the Board URL, saved changes and user is still getting this error when clicking the link. Do you think he needs a new link now? If so, how do I regenerate one?
Awesome that worked! One last question though, only because I'm stumped and would like to know.
Now that I've removed the /forums extension from Board URL, how is t hat url still working? It's working perfectly fine because I want my forums to point to http://forgehaven.com/forums/, but I'd like to know how it's working.