Try the following one by one. Refresh the page. (recommended) Re-log in. Restart your computer. Wait. Play something else, or do something else, and come back. (recommended)
This game has been having problems on and off the last couple of days, best thing you can do is to wait it out.
Waiting out is best. Odd having these bugs happen to serveral and then users like me only hear about them on the forums. A rumor is going around that it is A) kChamp coming soon and is working on issues B) Game getting too bugy due to lack of connection update?