I think Nyberg made a poor decision but it is far less straight forward than a player awarding himself a free kick.
Is it though? Raya clearly places the ball in a manner to take the goal kick and then does so. The ball is in play from that point on and Raya is in no way indicating that that wasn't a goal kick and he just wanted to give the ball to Gabriel. The latter still picks up the ball with his hand. Whether it's a lapse in concentration or whatever, that's a penalty. The explanation of not giving a penalty for a "kid's mistake" is a joke. It's a CL-quarterfinal, you shouldn't make "kid's mistakes", if you want to win one of the biggest trophies in football there is.
My feeling is that the same thing happened in our game. Taylor wanted to help out a player who had just lost his concentration and made a mistake. You can't do that though, when those mistakes (and especially avoiding them) is part of the game. You'd never hear anyone say the ref should have blown the whistle when Quansah gave the ball away and we conceded a goal as a result of that. Same should be true in an instance where a player thinks he has a freekick, but doesn't. Once Taylor realised what he had done, he was looking for a way out and just called on the physios to have a look at Areola.