can't figure out why this is happening

please help. i keep getting this message all over the payment pages for my memberships:

Warning: sprintf(): Too few arguments in /home/content/p3pnexwpnas06_data02/33/2281833/html/wp-content/plugins/protected-content/app/model/class-ms-model-membership_relationship.php on line 1093

i've been trying to figure it out for the past 24 hours and i can not keep going. i hope someone can help. thanks