This problem can sometimes be caused by disabling or refusing to accept cookies."

A site I am working on and had no problem loading in the past month suddenly displayed the following error after I loaded a cookie acceptance script in my backend. Tried clearing cache and all history but doesn't work. As this is a commercial site, I need it to work on all browsers. Please advise. "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."