World of tanks not rewarding silver

The  past two days i have played WoT to get silver get the usual pop ups upon opening and closing the game. The you are earning silver while playing this game and the claim you silver within the next X hours but when, i click claim silver and am navigated to the campaigns page on cortex as normal, but the option to claim silver is not there and the earned progress remains at 0/50. I am playing the steam version of World of tanks as that is the one  cortex links you too when you click the WoT logo and not play on the campaigns page