I went to the website on my iPhone and I clicked the button to go to the classic version and now I don't know how to get back to the mobile version.
I know this reply is late considering the date of your question; I'm sure you've figured it out by now. But I'm posting in case it helps someone else resolve the problem.
This is what worked for me... to get back to the mobile version of the website, go to the address bar and add "m." in the URL that appears.
So, what should be showing is You are not allowed to view links.
... change it to You are not allowed to view links.
That should put you back in mobile mode, and it works with a lot of websites!