Everytime I try to open the League of Legends PBE Client, a screen pops up to congratulate me on reaching Silver with Challenges. However, pressing "Accept" doesn't make it go away and, even worse, the sound of the Challenges animation repeats and stacks making a horrible loud noise. This bug still occurs after restarting my computer and repairing the client. When I logged on my second PBE account, the bug didn't appear since I'm Iron in Challenges.
External link →