title: OAuthException/ code = 2500/ message = "An active access token must be used to query information about the current user."
body: <p>I am trying to get data (like name,gender,birthday, profile picture etc) of the user that is logged in. I have tried following two codes, shown below:</p>
  
  <pre><code> //first: Create request for user's Facebook data
      FBRequest *request = [FBRequest requestForMe];
  
  // Send request to Facebook
  [request startWithCompletionHandler:^(FBRequestConnection *connection, id result, NSError *error) {
      NSLog(@"%@", error);
      if (!error) {
          // result is a dictionary with the user's Facebook data
          NSDictionary *userData = (NSDictionary *)result;
          NSLog(@"%@....",userData);
         _facebookID = userData[@"id"];
          _name = userData[@"name"];
          _location = userData[@"location"][@"name"];
          _gender = userData[@"gender"];
       _birthday = userData[@"birthday"];
          NSLog(@"%@",_name);
  
  
          _picutreURL = [NSURL URLWithString:[NSString stringWithFormat:@"https://graph.facebook.com/%@/picture?type=large&amp;return_ssl_resources=1", _facebookID]];
  
          self.nameField.text=_name;
          self.profilePicture.image=[UIImage imageWithData:[NSData dataWithContentsOfURL:_picutreURL]];
          self.profileInfo.text=[NSString stringWithFormat:@"%@, Live in %@ , Born on %@",_gender,_location,_birthday];
  
  
  
      }
  }];
  // 2nd:Fetch user data
  [FBRequestConnection
   startForMeWithCompletionHandler:^(FBRequestConnection *connection,
                                     id&lt;FBGraphUser&gt; user,
                                     NSError *error) {
       if (!error) {
           NSString *userInfo = @"";
  
           // Example: typed access (name)
           // - no special permissions required
           userInfo = [userInfo
                       stringByAppendingString:
                       [NSString stringWithFormat:@"Name: %@\n\n",
                        user.name]];
  
           // Example: typed access, (birthday)
           // - requires user_birthday permission
           userInfo = [userInfo
                       stringByAppendingString:
                       [NSString stringWithFormat:@"Birthday: %@\n\n",
                        user.birthday]];
  
           // Example: partially typed access, to location field,
           // name key (location)
           // - requires user_location permission
           userInfo = [userInfo
                       stringByAppendingString:
                       [NSString stringWithFormat:@"Location: %@\n\n",
                        user.location[@"name"]]];
  
           // Example: access via key (locale)
           // - no special permissions required
           userInfo = [userInfo
                       stringByAppendingString:
                       [NSString stringWithFormat:@"Locale: %@\n\n",
                        user[@"locale"]]];
  
           // Example: access via key for array (languages)
           // - requires user_likes permission
           if (user[@"languages"]) {
               NSArray *languages = user[@"languages"];
               NSMutableArray *languageNames = [[NSMutableArray alloc] init];
               for (int i = 0; i &lt; [languages count]; i++) {
                   languageNames[i] = languages[i][@"name"];
               }
               userInfo = [userInfo
                           stringByAppendingString:
                           [NSString stringWithFormat:@"Languages: %@\n\n",
                            languageNames]];
           }
  
           // Display the user info
           NSLog(@"%@",userInfo);
       }
   }];
  </code></pre>
  
  <p>But I get null string in output and detected this error:</p>
  
  <pre><code>Error Domain=com.facebook.sdk Code=5 "The operation couldn’t be completed. (com.facebook.sdk error 5.)" UserInfo=0x9499320 {com.facebook.sdk:ParsedJSONResponseKey={
      body =     {
          error =         {
              code = 2500;
              message = "An active access token must be used to query information about the current user.";
              type = OAuthException;
          };
      };
      code = 400;
  }, com.facebook.sdk:HTTPStatusCode=400}
  </code></pre>
  
  <p>What should I do?</p>