This has been going on for a while. It seems that every time an Era changes that the screen will go blank (no controls, no trains, no Corp Icons). I've tried refresh, I've tried continue playing, I've tried more information. It seems it doesn't matter what I try the results are the same.
About the only thing that has worked in the past is to just wait offline a few hours.
That is not a good recipe for keeping people playing.
Please fix this as soon as possible. I know it happens on the other server I play on and have seen comments on here from other servers so I believe that it is a system wide issue.