User first and last name not visible when "Requesting for Others"

When I try to do a "request for others" I´m not able to see the user name. I am able to select a user, any user... but the first last name won´t show, it shows as blank for all of them. Funny thing, I can still open the request and everything works fine, except for this visualization during the submit moment. I have tried adding trustees to the users OU for the attributes and all kinds of things. The only way I could get it to work is assigning the user with a system manager role (security manager, for instance). I tried opening up the permissions for the "Request on Behalf" that can be found in the Settings menu to the users OU, no results.

Any thoughts?