I'm following [Instagram authentication](https://www.instagram.com/developer/authentication/) [recommended] steps using UIWebView on an iOS app. 
After entering credentials, hitting login loads a page with following error.

> 
> This page could not be loaded. If you have cookies disabled in your
>  browser, or you are browsing in private mode, please try enabling
>  cookies or turning off private mode, and then retrying your action.
> 
> 
> 

And, this only happens on first run through the steps of authentication; on the next attempt, everything works smooth as silk. I get the code suffixed to redirect url and I request access token using it.

Screenshot:

[![enter image description here](https://i.stack.imgur.com/Zu3kS.jpg)](https://i.stack.imgur.com/Zu3kS.jpg)

There's already another question [here](https://stackoverflow.com/questions/30389316/error-logging-into-instagram-with-python) and it doesn't help.

**EDIT:**
It seems like Cookies issue. Though, I haven't been able to fix it yet.