Wordpress cookies problem!

Considering I can reach your admin login page just fine, I think you’re likely just facing this:

In which case the error message should be taken completely literally. Your web browser must have cookies enabled in order to successfully pass the security check so the security system recognizes it as a browser. To demonstrate, if I try to go to the link you provided with cookies disabled it shows me this error page:

But once I enable cookies and try again it works just fine.