VAR error! Why Arsenal FC should have been awarded a penalty against Hull despite Kai Havertz offside

The IFAB ‘Laws of the Game’ for this season states: “A player in an offside position is moving towards the ball with the intention of playing the ball and is fouled before playing or attempting to play the ball, or challenging an opponent for the ball, the foul is penalised as it has occurred before the offside offence.”