Page isn't redirecting properly

Hi,

I am pretty much a newbie and although I have read posts relating to this, I still cannot figure out what I need to do.

I have uploaded an ebook, “The Beginner’s Guide to Better Photography” as a pdf in the Media Library, but when I try to view it I get the message,

“The page isn’t redirecting properly

Firefox has detected that the server is redirecting the request for this address in a way that will never complete.

This problem can sometimes be caused by disabling or refusing to accept
cookies.”
You can find the ebook here https://www.photobloggerme.com/photoblog/wp-admin/upload.php

I’ve tried de-activating the plug-ins but it doesn’t make any difference. I am already using the Twenty Eleven theme.

As I say, I am a newbie and not very “techy” so need some fairly simple instructions if possible. Thanks.