The text usually happens when I click on a card to perform an action, and then the action does not occur. I wait a few moments, then hit Refresh, and the red text appears just before the window actually refreshes. If I wait a little longer before hitting Refresh, the text says:
"There was a problem communicating with the server
, if the game is finished, it has been removed, otherwise you have lost connection to the server.
Refresh the page (press F5) to resume the game, or press back on your browser to get back to the Game Hall."