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.
#3088 - Logging out returns 500 error (stack trace provided)
I think you mean moving/copying the require_code('global3') further up in init__global2. That should work, the only reason I didn't is a small performance hit for the requests we've made to not need it.
The fix is to move the cms_srv function from global3.php to global2.php.
A workaround is to remove the backdoor_ip line from _config.php (it can't be there at all, not even blank).