When I upgrade on WordPress network I get the following error every time.
The webpage at http://everythingouterbanks.com/wp-admin/users.php?page=s2_users has resulted in too many redirects. Clearing your cookies for this site or allowing third-party cookies may fix the problem. If not, it is possibly a server configuration issue and not a problem with your computer.
Site becomes unavailable. Clearing cookies does not help etc. We run hundreds of WordPress and several Network systems with no problems. We only tried subscribe2 on this one site. It seems to be fine on single WordPress installs.