bbPress.org

I don’t have any clues to solve you problem.

If I were you, I will

1. put error_log('WordPress loaded'); after that request_once to make sure wp has been loaded.

2. check error log for WordPress loaded, if I get that, that means the problem should be on bbPress, or on WordPress.

3. keep using error_log, find out where causes a program end.

This is my no-debugger-debugging method.