frontend access level bug fix

app/helpers/orbit_helper.rb

@@ -138,7 +138,9 @@ module OrbitHelper
 
   def self.user_access_level?
     access_level = nil
-    if @current_user.is_admin?
+    if @current_user.nil?
+      access_level = "user"
+    elsif@current_user.is_admin?
       access_level = "admin"
     elsif @current_user.is_manager?(@module_app)
       access_level = "manager"