It's not showing anything because you don't have CB Activity installed. You installed its module, which does not track or log activity; it just displays it as a module. You need to install the CB Activity CB plugin included with the CB Activity package. I've went ahead and installed it for you and confirmed it's display fine now.
I've also configured your Workflows module to display on a position that exists in the protostar template; note you have it set to only display on the Home page and only if logged in.
Please confirm everything is displaying fine now.
Also for future module placement the below is a module map for the protostar template on your site.