Board Thread:Support Requests - Designing Your Wiki/@comment-31808832-20170508232438/@comment-1824272-20170508235825

Assuming you're talking about http://theonepiececommunity.wikia.com

You cannot use Special:Forum because that forum is going to be converted to Discussions, which your wiki has already converted to since it's a new wiki. http://theonepiececommunity.wikia.com/d is where you can access Discussions.