At times when you go from one era to another you can not click on anything and refreshing browser is needed. I am using the latest version of Firefox. Same thing is happening to other players in guild at same time while using other browsers as well. Game breaking when you see you are under seige and the team shows up to break it and none of you can click thru to do a battle and have to restart browser. Everything looks like its normal but it will not allow you to click anything. This seems to have started the last event and was not happening as much between events.