I just went into a Ranked match, just to find out i get a error when i try to switch my masteries from a empty page to my normal page.
so i had to play a whole ranked game without masteries.
now after 3 tries of trying to change my masteries in aram, still didn't work.
Is there something you really can't do without in the client? Is Udyr displaying as a Picasso painting again? This is the place to report bugs and give suggestions for League of Legends in general!
Don't spam your suggestions or bug reports here, and follow the [Universal Rules](http://boards.euw.leagueoflegends.com/en/c/announcements-en/3eWpXbJi). While not every suggestion here will be implemented, your favourites can be voted to the top for maximum visibility!