It is the Group Forum and yes white/blank pages everywhere. That part is now fixed. Had to rename my plugins folder, create a new one and troubleshoot by adding back all my plugins one at a time. Never found the killer. I also changed my theme, so it could have been that.
I figured out somehow what was causing the loop and that is fixed, though I really don’t know how I did it.
I just installed also and I’m having the same problem. I went through the installation wizard. Installed several different Buddypress themes and cannot customize or even access most of the components. Installed a buddypress toolbar. Same problem.