Rho :: RhoContact.find () is not working in Rhodes 5.0.2 version, or am I doing something wrong, will someone help me?

if System::get_property('platform') == 'APPLE'
      contact = {
          "first_name" => @params['first_name'],
          "mobile_number" =>  "(" + @params['mobile_number_ddd'] + ") " + @params['mobile_number'],
          "person_note" => @params['addressDescription'] + " " + @params['addressNumber'] + " " + @params['neighborhood'] + " " + @params['cityName'] + " " + @params['cityUF']
      }
    else
      contact = {
          "first_name" => @params['first_name'],
          "mobile_number" =>  "(" + @params['mobile_number_ddd'] + ") " + @params['mobile_number']
      }
    end
 
    @contact2 = Rho::RhoContact.find(contact)