[Plugin: Secure Invites] Invite page error

On the Invite page : /wp-admin/index.php?page=secure_invite
I get the following error: Warning: Missing argument 1 for secure_invite_user_invites_remaining(), called in /home1/twogloba/public_html/jossterrell/wp-content/plugins/wordpress-mu-secure-invites/secure_invite.php on line 2139 and defined in /home1/twogloba/public_html/jossterrell/wp-content/plugins/wordpress-mu-secure-invites/secure_invite.php on line 1954
Unlimited invites

http://wordpress.org/extend/plugins/wordpress-mu-secure-invites/