I can't play any of my online games at the moment. The board is simply empty, and the game log has no recorded moves! Could somebody help me out?

Your games appear fine on my end.  Have you tried a cache refresh?  What browser/version are you using? 

I use Google Chrome. I'm not sure what a cache refresh means.

I've tried Internet Explorer, but the same thing happens. It must be a problem specific to my computer.

I haven't found a solution. What do you mean by a cache refresh?