"Player ID not found" while trying to add a player after a Ranked Match.

Oh sure, this Gus must be cooking something alright? He picked Gus cuz he must be smurfing and knows how to play it, he must know how to use his super on allies, he must know there's a knock back on it as well. He must also know to land his shots, right? I'm sure I shouldn't have to dodge this one and get punished for it. I must be making so many assumptions based on just a "mere feeling" without actually judging the player for his skills. I mean, all players are different. There's absolutely no way he's gonna tro-