We apologize for the instability of composr.app and appreciate your patience. We are working on the statistics addon and trying to find an optimal way to store and render data. Unfortunately, we have yet to find a solution that can handle the traffic (and therefore, tens of millions of statistical records) of composr.app. We're working hard on one.
#2269 - Activity feed: Doesn't seem to always syndicate when it should
If you enable Guest access, or change Modal user to e.g. 'test' (i.e. a user with access) it should work.