From the
Model Mayhem FAQ:
Why can’t I see someone’s profile?
Not being able to see some member profiles is a privacy setting that some of our members enable on their profiles which limits the view of their profiles to other members only, which excludes the public, search engines, and Talent Recruiters from seeing their profiles or portfolios.
As a Talent Recruiter, you have a different account type than a member and as a result, if this privacy setting is enabled it prevents you from seeing their profile. If you are attempting to see the profile of someone who has responded to your casting call, please reply back to them that you are unable to see their profile due to their privacy setting, or, request for them to send you their images via email.