I love the plugin, but once installed on my site, when a user successfully logs in on the main site, they get a 500 error page. Click back and they are back on the site, logged in and all else works.
I'm using the plugin with a child theme from WPMU Dev. The only thing I think that is different is that I renamed the slug of the my registration page to "join-the-crew" to cut down on spam sign ups.
I've disabled the plugin and that fixed the issues. The site is threesheetsnw.com.
Thanks for your suggestions for fixing this.