Error Message on New Setup

I am setting up a new membership applications. I had to import user data from another program so I used Cimy User Extended. I am also running Multi Site. I get the follow error when users are directed to create a new account...

Fatal error: Call to a member function get_error_message() on a non-object in .../wp-content/plugins/cimy-user-extra-fields/cimy_uef_register.php on line 1043

Any suggestions on how to resolve?

Thanks