They're trying to argue that Casemiro's second yellow wasn't a card, and not even a foul.
The bias and delusion is ridiculous - it's as clear as a foul and yellow as you will ever seen. Santos is about to pass the ball wide into a dangerous position, but Casemiro stops him by dragging him back and that's how he eventually wins the ball.
Because they are so crap they think all the referees are against them. They even argued that Rashford red card against Copenhagen wasn't a red a few seasons ago, but when it comes to them they think they should get penalties for the most innocuous of challenges.
They're a desperate, moronic bunch, who can't accept they're finished. So blame referees.