Can't add new users using membership2 plugin

It was working fine but now when you register it simply empties the form and you do not get access. However you get the email saying you are registered but it will not allow you in. Site is about 96% complete and my client was expecting to launch soon.

WP Engine Hosting

Also we had to turn off WPMU Admin plugin as it was causing server timeout. Got a fix and followed directions but it caused the same problem. I have that on another ticket but wanted to let you know.

site is –

I can give you wp admin access but not sure how to do that here.