I set up all my subscriptions and member levels and went for a trial run. I have the signup form set to popup which it does nicely. When I enter information into the new user fields and hit the Register My Account button the popup changes to an all white background with the following text:
Fatal error: Cannot use object of type WP_Error as array in C:\Inetpub\vhosts\emma-land.com\httpdocs\wp-content\plugins\membership\membershipincludes\classes\membershipadmin.php on line 7294
I have tried repairing membership's tables in the Options->Advanced tab.