There are not currently any server outages, and I see no problems with that particular game or your account.
So I expect you have a browser problem.
Clear your browser cache
Close your browser
restart your browser
Then try your game again.
If that fails: delete your browser cookies and repeat the above steps, with the addition of restarting your computer possibly.
If that does not work perhaps try a different browser. I have the best luck with Chrome for this game, while many people use firefox successfully as well.
If that fails please submit a bug report from the link in my signature explaining the problem, game number, and steps you have taken trying to fix it already.