Some users experience difficulty logging into our web site and got the following error message.
An error occurred while processing your request. Reference #97.64bcf648.1412893809.36fcbfb4
They said that they could sometimes log in but sometimes couldn't do.
I and my co-workers tried to do it a lots, but We didn't get any errors. The users said that they removed all of cookies and caches.
What's happening with our web site?