Tried to purchase new tank last night and game wont allow the purchase. Doesn't matter if it is a Premium tank or on the regular tech tree. Can click on the tank ,goes to crew training screen, can choose training, but cant purchase. The two boxes at bottom of screen are blank, no words. Checked to make sure that gold and xp were unlocked and they are. Is this a setting issue or something else. wasn't any problems until the new patch. Help!!!!!!!!! Stuck at Tier 4 for life right now.