I had a response from the Support Desk as below:
"At this time, all we know is that one of our servers had a technical issue around the time you sent us a ticket. We have our back up servers for this reason. We are working with our hosting company to determine what might have been the problem. We apologize for the inconvenience this has caused you and understand how stressful this must be at this critical time in your preparation. Hope you can try logging in again to see if it now works for you"
I managed to get in and see a result for the exam up to the crash, which was 80% (20 questions not attempted). I still cant view the "My statistics" screen. Just a bummer I didn't get to finish. I was hoping for a results screen with a big score in the 90's, just to give me that confidence boost for tomorrow. Hoping for good luck instead!