Hello Knights!
It looks like one of the gerbils operating the servers is MIA. We've had to take the EU servers down for now and you wont be able to purchase any energy or prize box packages. We're working to wrangle up a replacement gerbil and get everything working normally again. We don't know how long this will take, so thank you in advance for your patience. We'll try to keep you updated here once everything is working normally.
It looks like we were able to lure the gerbils back into cooperating and the game should be functioning normally now. I'm sorry for the inconvenience knights!