BuddyPress.org

I doubt that it stopped to work as it was updated recently (29 March, 2016).
You’ve better to ask for this issue on the plugin support.

In the meanwhile, have you activated wp_debug in wp-config ?
Perhaps this will show you some php errors you ignore at this time.

You could (should) also give some details about your install when asking such obscur question. Do you use custom functions, plugin list, theme name, wp, bp, php version…