If you ever needed a lesson in the difference between power and authority, this is a good one.
The leaders of this coup read the rules and saw that they could use the board to remove Altman, they had the authority to make the move and “win” the game.
It seems that they, like many fools mistook authority for power. The “rules” said they could do it! Alas they did not have the power to execute the coup. All the rules in the world cannot make the organization follow you.
Power comes from people who grant it to you. Authority comes from paper. Authority is the guidelines for the use of power, without power, it is pointless.