This is the same problem I’ve been fighting. Would really love a solution to it…
I tried Raamdev’s suggestion and I got this error upon installation:
Forum could not be created!
If I go to my bbpress main url, it says
Oh dear!
bbPress is already installed.
Perhaps you meant to run the upgrade script instead?
And then bumps me back to the same error of the installation page.
Wonderful, thank you for the clarification!
I’m sorry for just barging into the conversation mid-way but is there going to be BuddyPress progress with this too? Or was that just an unrelated project? 
