title: (com.facebook.sdk.login error 304.) Error with FBSDK 4.2
body: <p>I am trying to implement login with Facebook functionality, But I am getting following error in return.</p>
  
  <blockquote>
    <p>Login Failed with error: The operation couldn’t be completed.
    (com.facebook.sdk.login error 304.)</p>
  </blockquote>
  
  <p><strong>Here is my Code</strong></p>
  
  <pre><code>    - (void)loginWithFacebook {
          NSString *const read_actions = @"email";
  
          [[[FBSDKLoginManager alloc] init]
           logInWithReadPermissions:@[read_actions] handler:^(FBSDKLoginManagerLoginResult *result, NSError *error)
           {
               if (error) {
                   NSLog(@"Login Failed with error: %@", error.localizedDescription);
               }
               else if (result.isCancelled)
               {
                   NSLog(@"Login Failed due to Cancel");
               }
               else
               {
                   if ([result.grantedPermissions containsObject:read_actions]) {
                       NSLog(@"Permission granted");
  
                   }
               }
           }];
      }
  </code></pre>