I upgraded to User Role Editor 3.12 yesterday. Today I can login to my WP site only as admin or subscriber. If I use any other role, the login page return a simple text page that says "Service is not available."
I am using this plugin along with s2Member so that I can define specific capabilities for different levels of users.
Honestly, not sure if this plugin is the problem, but I have not changed anything else on the site that I know of.
Thanks for any help.