I have the same issue… Immediately after I try to activate the bbPress pluging, I’m redirected to a page the says “Sorry, you are not allowed to access this page.”. I have to use the browser’s ‘back’ button to get back to the WordPress dashboard.
When I check in ‘Users’, I notice that I (Administrator) now has a new credential ‘Administrator, Keymaster’ and there is now a new column, called ‘Forum’, where the new role ‘Keymaster’ has also been assigned to me.
However, I do not see the ‘Forum’ item anywhere in the sidebar or top bar, nor in the Settings or Tools items.
What’s up?