I am playing as Morocco in a game, and when my enemy has conquered every province of my country and only the capital was left, then a player offered me a tank for 4,200 goldmarks(I had around 14k goldmarks at that time), then I accepted the offer and a message error appeared with title "Action failed" and saying "Failed to process purchase. Action could not be processed by server." which took away 4k of my goldmarks and then I get no tanks, I tried it another time, yet no result but just a loss of 4k goldmarks(I did it another 3rd time to take a screenshot, which droppd me to 2k goldmarks).
The game number is Game ID 266520
Screenshot: Attachment 8810
Another clear screenshot: Attachment 8811
The game number is Game ID 266520
Screenshot: Attachment 8810
Another clear screenshot: Attachment 8811