Unexpected Platform Error - Makes it so none of your mastery points register in game

There's a serious error that comes up as 'Unexpected Platform Error' that makes it so none of the mastery points you put in are actually used in the game so you have absolutely 0 masteries. They should probably disable ranked and/or do something about this ASAP. Not GAMEBREAKING, but BALANCE BREAKING pretty badly. Tarnishes a fair play environment.