You should be able to open the Site License window, Panorama will allow you to do that no matter what. Can you? Once you have, try switching to the History or Computers panel. This will cause Panorama to contact the provue.com server to get the information to display. Does that work? Does it display your usage history and logged in computers?
Do you have access to another computer? If so, you could try logging in with your account and see if you get the same problem. That would isolate whether the problem is on the computer or the network.